New SAT Math - Calculator : Conversions

Study concepts, example questions & explanations for New SAT Math - Calculator

varsity tutors app store varsity tutors android store

Example Questions

Example Question #3 : Solving Word Problems With One Unit Conversion

A carpenter is making a model house and he buys \(\displaystyle 8\textup{ feet}\) of crown moulding to use as accent pieces. He needs \(\displaystyle 24\textup{ inches}\) of the moulding for the house. How many feet of the material does he need to finish the model?

Possible Answers:

\(\displaystyle 2 \textup{ feet}\)

\(\displaystyle 2 \tfrac{2}{3}\textup{ feet}\)

\(\displaystyle 1 \tfrac{1}{2}\textup{ feet}\)

\(\displaystyle 2 \tfrac{3}{4}\textup{ feet}\)

\(\displaystyle 2 \tfrac{1}{2}\textup{ feet}\)

Correct answer:

\(\displaystyle 2 \textup{ feet}\)

Explanation:

We can solve this problem using ratios. There are \(\displaystyle 12\ inches\) in \(\displaystyle 1\ foot\). We can write this relationship as the following ratio:

\(\displaystyle 12\ inches:1\ foot\rightarrow \frac{12\ inches}{1\ foot}\)

We know that the carpenter needs \(\displaystyle 24\ inches\) of material to finish the house. We can write this as a ratio using the variable \(\displaystyle x\) to substitute the amount of feet.

\(\displaystyle 24\ inches:x\ feet\rightarrow \frac{24\ inches}{x\ feet}\)

Now, we can solve for \(\displaystyle x\) by creating a proportion using our two ratios.

\(\displaystyle \frac{12\ inches}{1\ foot}=\frac{24\ inches}{x\ feet}\)

Cross multiply and solve for \(\displaystyle x\).

\(\displaystyle 12\ inches \times (x\ feet)=24\ inches \times (1\ foot)\)

Simplify.

\(\displaystyle 12x=24\)

Divide both sides by \(\displaystyle 12\).

\(\displaystyle \frac{12x}{12}=\frac{24}{12}\)

Solve.

\(\displaystyle x=2 \ feet\)

The carpenter needs \(\displaystyle 2 \ feet\) of material.

Example Question #91 : Ratio And Proportion

A carpenter is making a model house and he buys \(\displaystyle 8\textup{ feet}\) of crown moulding to use as accent pieces. He needs \(\displaystyle 38\textup{ inches}\) of the moulding for the house. How many feet of the material does he need to finish the model?

Possible Answers:

\(\displaystyle 3 \tfrac{1}{2} \textup{ feet}\)

\(\displaystyle 3 \tfrac{1}{6}\textup{ feet}\)

\(\displaystyle 3 \tfrac{5}{6}\textup{ feet}\)

\(\displaystyle 2 \tfrac{5}{6}\textup{ feet}\)

\(\displaystyle 3 \tfrac{3}{4}\textup{ feet}\)

Correct answer:

\(\displaystyle 3 \tfrac{1}{6}\textup{ feet}\)

Explanation:

We can solve this problem using ratios. There are \(\displaystyle 12\ inches\) in \(\displaystyle 1\ foot\). We can write this relationship as the following ratio:

\(\displaystyle 12\ inches:1\ foot\rightarrow \frac{12\ inches}{1\ foot}\)

We know that the carpenter needs \(\displaystyle 38\ inches\) of material to finish the house. We can write this as a ratio using the variable \(\displaystyle x\) to substitute the amount of feet.

\(\displaystyle 38\ inches:x\ feet\rightarrow \frac{38\ inches}{x\ feet}\)

Now, we can solve for \(\displaystyle x\) by creating a proportion using our two ratios.

\(\displaystyle \frac{12\ inches}{1\ foot}=\frac{38\ inches}{x\ feet}\)

Cross multiply and solve for \(\displaystyle x\).

\(\displaystyle 12\ inches \times (x\ feet)=38\ inches \times (1\ foot)\)

Simplify.

\(\displaystyle 12x=38\)

Divide both sides by \(\displaystyle 12\).

\(\displaystyle \frac{12x}{12}=\frac{38}{12}\)

Solve.

\(\displaystyle x=3 \tfrac{2}{12} \ feet\)

Reduce.

\(\displaystyle x=3 \tfrac{1}{6} \ feet\)

The carpenter needs \(\displaystyle 3 \tfrac{1}{6} \ feet\) of material.

Example Question #11 : Solving Word Problems With One Unit Conversion

A carpenter is making a model house and he buys \(\displaystyle 8\textup{ feet}\) of crown moulding to use as accent pieces. He needs \(\displaystyle 64\textup{ inches}\) of the moulding for the house. How many feet of the material does he need to finish the model?

Possible Answers:

\(\displaystyle 4 \tfrac{1}{3} \textup{ feet}\)

\(\displaystyle 5 \tfrac{2}{3} \textup{ feet}\)

\(\displaystyle 5 \tfrac{1}{3} \textup{ feet}\)

\(\displaystyle 6 \tfrac{1}{3} \textup{ feet}\)

\(\displaystyle 4 \tfrac{2}{3} \textup{ feet}\)

Correct answer:

\(\displaystyle 5 \tfrac{1}{3} \textup{ feet}\)

Explanation:

We can solve this problem using ratios. There are \(\displaystyle 12\ inches\) in \(\displaystyle 1\ foot\). We can write this relationship as the following ratio:

\(\displaystyle 12\ inches:1\ foot\rightarrow \frac{12\ inches}{1\ foot}\)

We know that the carpenter needs \(\displaystyle 64\ inches\) of material to finish the house. We can write this as a ratio using the variable \(\displaystyle x\) to substitute the amount of feet.

\(\displaystyle 64\ inches:x\ feet\rightarrow \frac{64\ inches}{x\ feet}\)

Now, we can solve for \(\displaystyle x\) by creating a proportion using our two ratios.

\(\displaystyle \frac{12\ inches}{1\ foot}=\frac{64\ inches}{x\ feet}\)

Cross multiply and solve for \(\displaystyle x\).

\(\displaystyle 12\ inches \times (x\ feet)=64\ inches \times (1\ foot)\)

Simplify.

\(\displaystyle 12x=64\)

Divide both sides by \(\displaystyle 12\).

\(\displaystyle \frac{12x}{12}=\frac{64}{12}\)

Solve.

\(\displaystyle x=5 \tfrac{4}{12} \ feet\)

Reduce.

\(\displaystyle x=5 \tfrac{1}{3} \ feet\)

The carpenter needs \(\displaystyle 5 \tfrac{1}{3} \ feet\) of material.

Example Question #12 : Solving Word Problems With One Unit Conversion

A carpenter is making a model house and he buys \(\displaystyle 8\textup{ feet}\) of crown moulding to use as accent pieces. He needs \(\displaystyle 72\textup{ inches}\) of the moulding for the house. How many feet of the material does he need to finish the model?

Possible Answers:

\(\displaystyle 4 \textup{ feet}\)

\(\displaystyle 6 \tfrac{1}{3} \textup{ feet}\)

\(\displaystyle 7 \textup{ feet}\)

\(\displaystyle 5\textup{ feet}\)

\(\displaystyle 6 \textup{ feet}\)

Correct answer:

\(\displaystyle 6 \textup{ feet}\)

Explanation:

We can solve this problem using ratios. There are \(\displaystyle 12\ inches\) in \(\displaystyle 1\ foot\). We can write this relationship as the following ratio:

\(\displaystyle 12\ inches:1\ foot\rightarrow \frac{12\ inches}{1\ foot}\)

We know that the carpenter needs \(\displaystyle 72\ inches\) of material to finish the house. We can write this as a ratio using the variable \(\displaystyle x\) to substitute the amount of feet.

\(\displaystyle 72\ inches:x\ feet\rightarrow \frac{72\ inches}{x\ feet}\)

Now, we can solve for \(\displaystyle x\) by creating a proportion using our two ratios.

\(\displaystyle \frac{12\ inches}{1\ foot}=\frac{72\ inches}{x\ feet}\)

Cross multiply and solve for \(\displaystyle x\).

\(\displaystyle 12\ inches \times (x\ feet)=72\ inches \times (1\ foot)\)

Simplify.

\(\displaystyle 12x=72\)

Divide both sides by \(\displaystyle 12\).

\(\displaystyle \frac{12x}{12}=\frac{72}{12}\)

Solve.

\(\displaystyle x=6 \ feet\)

The carpenter needs \(\displaystyle 6 \ feet\) of material.

Learning Tools by Varsity Tutors