Question

Jillian is driving away to her friends house for the weekend.
For the first one and a half hours she drives 84 km per hour.
For the next hour she drives 75 km per hour.
For the final two and a quarter hours she drives 60 km per hour.
If she drives the entire trip back home at a constant speed of 72 km per hour how much less time will Jillian spend driving?
BTW I need this answer in minutes

Answer 1

Here isn’t the answer to your question.

d=distance

s=speed

t=time