Question

A bus took a six hour trip and traveled 225 miles. The speed was 40 mph for the first part of the trip, and then decreased to 25 mph for the second part of the trip. How many hours were traveled at each speed?

Answer 1

The bus traveled at 40 mph for 5 hours, and at 25 mph for the last hour.

Explanation:

The time for the first part is t. Therefore the time for the second part if (6-t).

40t + 25 (6-t) = 225

40t + 150- 25t = 225

15t = 75

t=5