Question 706126
A motorist takes 3 hours and 12 minutes to cover the distance between two town when travelling at a constant speed of 90 km/h.  What is the distance between the towns?

1 hour = 60 minutes.

So in 60 minutes he travels 90 km

90/60 = 3/2 = 1 1/2 km

So in 1 minute he travels 1 1/2 km

In 3 hours he travels:

90 * 3 = 270 km

In 12 minutes he travels:

12 * 3/2 = 36/2 = 18 km

In 12 minutes he travels 18 km

Therefore:

270 + 18 = 288 km

The answer:

288 km



Lennox Obuong
Algebra Tutor