MathDB

Every morning, Aya does a

9

kilometer walk, and then finishes at the coffee shop. One day, she walks at

s

kilometers per hour, and the walk takes

4

hours, including

t

minutes at the coffee shop. Another morning, she walks at

s+2

kilometers per hour, and the walk takes

2

hours and

24

minutes, including

t

minutes at the coffee shop. This morning, if she walks at

s+\frac12

kilometers per hour, how many minutes will the walk take, including the

t

minutes at the coffee shop?

Problem Statement