Question

· A car travels at a speed of 50 km/hr for 30
minutes, at 30 km/hr for next 15 minutes
and then 70 km/hr for next 45 minutes.
What is the average speed of the car?​

Answer 1

Answer:

Answer:average speed= total distance / total time

First we have to convert min into hours

In first case

30 min= 30/60=1/2 hr

In second case

15 min= 15/60=1/4 hr

In third case

45 min= 45/60= 3/4 hr

distance= speed * time

In first case

distance= 50*1/2

= 25km

In second case

distance= 30*1/4

=12.5km

In third case

distance= 70*3/4

= 52.5km

Average speed= Total distance/ Total time

Average speed= 25+12.5+52.5/0.5+0.25+0.75

Average speed= 90/1.5

Average speed= 60 km/hr

Average speed= 60km/hr

Thank you

Answer 2

Answer:

Hope it will help for you