Question

A car covers a distance of 45 minutes if it runs at a speed of 40 kilometre per hour what time will it take if it runs at 72 km per hour​

Answer 1

In case 1

time - 45 minute - 2700 second

Speed - 40 km per hour

change it into meter per second

40*5/18

11.1

dis - speed *time

dis- 2700*11.1

dis-29970meter

In case 2

speed - 72 km per hour - 20 meter per second

time - dis * speed

time - 11.1*20

time-222 seconds

time - 3.7 minutes

I hope it will help you

Answer 2

Answer:

25 minutes

Step-by-step explanation:

distance = speed * time

d = 40 * 0.75 = 30 km

t = d/s

t = 30/72 hr

t = 5/12 hr = 25 minutes