Question

A car travel 30km with a speed of 40kmph and next 30 km with a speed of 20kmph .find it's average speed

Answer 1

Answer:

26.66km/hr

Explanation:

40km in 1hr

30km in 1×30/40=3/4=45minutes

20km in 1hr

30km in 1×30/20=1hr 30minutes

therefore time taken 2hr 15minutes..

now total distance= 60km

avg speed= 60/2.25 km/hr= 26.66km/hr