Question

3 molly and liza are exercising. molly does 10 push - ups at the same time as liza does 15 push - ups. when molly does 40 push - ups, how many push - ups does liza do?

Explanation:

Step1: Find the ratio

Molly's push-ups : Liza's push-ups = 10 : 15 = 2 : 3

Step2: Calculate Liza's push-ups

Let Liza's push-ups be $x$. $\frac{2}{3} = \frac{40}{x}$ → $x = \frac{40×3}{2} = 60$

Answer:

60