algebra word problem

Question

How far away can a boy ride his bicycle if he rides away at 10 kilometers per hour and returns at 9 kilometers per hour? The entire trip takes 9.5 hours.

Answer 1

D = S x T

 

D1= 9kh x T

 

D2 =10kh x T

 

10k/h x 4.5hrs =  45k

 

9k/h x T = 45K

 

T = 5

 

 

The distance is 45K