Asked by Selena

A runner takes 20 seconds to run 100 meters. How long to run 25 meters?

(Ex. 25/100 = 20/?)
Answered by Ms. Sue
You've misstated the ratio.

20/100 = x/25

Cross multiply and solve for x

100x = 500
x = 500/100
x = 5

Answered by Selena
oh thank you!!
Answered by Ms. Sue
You're welcome.