All GMAT Math Resources
Example Questions
Example Question #21 : Calculating Ratio And Proportion
An architect built a scale model of a new building she was designing. In the scale model, the base of the building is wide by long. If the actual building with have base length of , what will the width of the actual building be?
We are asked to compare lengths of sides between a scale model and an actual building. This sounds like a ratio question. Set up our ratio so that our unknown is in the numerator. Make sure to set it up with similar sides together:
Cross-multiply and simplify to find the correct answer:
So, the width of the actual building is .
Example Question #162 : Arithmetic
Leticia ran a half marathon (13.1 miles) in hours and minutes. Using her average running speed, how long would it take her to run a 10k (6.2 miles)?
(Round your answer to the nearest minute).
We need to use her total time and distance to find her running pace. Once we do, we can solve the problem.
That is, she ran at about a -minute-mile pace
So, it will take her about
Example Question #21 : Ratio & Proportions
If a fabric costs a yard, how much will feet cost?
(Round your answer to the nearest cent.)
We first need to determine how much one foot of the fabric cost. Remember, one yard is equivalent to three feet:
So, five feet would cost