Question

A person jogs 4.0km in 32 minutes, then 2.0km in 22 min, and finally 1.0km in 16 min. What is the jogger’s average speed in km per min.

Answer 1

Step-by-step explanation:

4km =4000m

2km = 2000m

1km= 1000 m

Avg. speed=Sum of the distance( m)÷Sum of Time(min.)

=4000+2000+1000÷32+22+16

=7000÷70

=100 m

Hence, the avg. speed is 100m = 0.1km per minute

The second way can be

Avg. speed= (4+2+1)km÷(32+22+16)min.

=7÷70

0.1km per minute