Question

Christy is doing her homework. After every 15 minutes of studying, she gets up and takes a 5 minutes break. If she has 2 hours if homework to do, how long will it take her to finish it.

Answer 1

2 hours is also 120 minutes

120/15=8

8 x 5=40

120+40=160

It will take her 160 minutes to finish, or 2 hours and 40 minutes