Question 100 Problem Solving 2020 GMAT Official Guide

Question 100 Problem Solving 2020 GMAT Official Guide

Video explanation [PQID: PS40602.01]: On a scale drawing, a rectangle 1 inch by…

Comments

Aswin Kumarsays

Hi Mahendra I approached the question by multiply 300* 12, I got 3600 inches this divided by 6*6 gives me 100 tiles, only If I multiply this by 12 inches I am getting 1200

The $300$ you obtained is the area of the floor in square feet. To convert from square feet to square inches, you have to multiply by $12 \times 12$. This is because $1$ square feet is equal to $144$ square inches, whereas one linear feet is equal to $12$ inches.

Aswin Kumar says

Hi Mahendra I approached the question by multiply 300* 12, I got 3600 inches this divided by 6*6 gives me 100 tiles, only If I multiply this by 12 inches I am getting 1200

Can you help me with where I am going wrong.

GMAT Quantum says

Hi Aswin,

The $300$ you obtained is the area of the floor in square feet. To convert from square feet to square inches, you have to multiply by $12 \times 12$. This is because $1$ square feet is equal to $144$ square inches, whereas one linear feet is equal to $12$ inches.

I hope this makes sense.

Dabral