Question

An object moves through 10 m in 2 minutes and next
10 m in 3 minutes. Calculate its average speed.
7.
A car moyes through 20 km at a speed of 40 km/h,​

Answer 1

Explanation:

1. Average speed = total distance/total time

10+10/2+3 = 20/5

= 4

2 ..

Average speed of first distance = 20km

Distance = 20km/h

speed = 40 km/h

Time taken = 20/40

= 1/2 hours

2nd time average

Distance= 20km

speed = 60km/h

Time taken by the car is

20/60=1/3hours

Total time taken = t1 + t2 = 1/2 +1/3 = 5/6 h

Average speed of the car is = (20+20)/(5/6)

= 48 km/h

I hope it will help you