Question

a car travels along a straight line for the first half time with speed of 40km/h in the second half time with a speed of 60km/h.find the avg speed of the car

Answer 1

Hey.

Here is the answer.


Let total travel time be 2 hours.

So first half time = first 1 hr ; speed=40kmph

distance travelled in first 1h = 40 km

so 2nd half time = 2nd 1 hr;speed=60kmph

distance travelled = 60 km

so, total distance travelled= 40+60 =100km

total time = 2h

so, average speed = total distance travelled/total time taken

= 100/2 = 50 kmph

Thanks.