Question

A car covers 20 km in the first hour and cover 50 km in the last 4 hours. Find its average speed?
a. 6 km/hr.
b.14 km/hr.
c .5 km/hr.
d. 9 km/h.

Answer 1

Answer:

OPTION B IS CORRECT.

Explanation:

$total \: distance = 20 + 50 \\ \\ = 70 \: km \\ \\ total \: time = 1 + 4 \\ \\ = 5 \: hour \\ \\ average \: speed = \frac{total \: distance}{total \: time} \\ \\ = \frac{70}{5} \\ \\ = 14 \: km \: per \: hour.$