Solve this problem

Question

Solve this problem using five steps for problem solving (familiarize, translate, carry out, check, state).

 

A cheetah can run 20 miles per hour faster than a lion. A cheetah can run seven miles in the same time that a lion can run 5 miles. Find the speed of each animal.

Answer 1

lion speed =l cheetah speed = l+20

 

time take to run 7 miles by cheetah = time taken by lion to run 5 miles

time=distance/speed

 

7/(l+20) = 5/l

7l=5l+100

2l=100==> l= 50mph and cheetah's speed = 70mph