Question

A bus covers 30 km at a uniform speed of 60 kmh. It covers next
30km with a speed of 40 kmh-1.The total time to cover the distance is .
​

Answer 1

Answer:

1.25 hrs

Explanation:

Case 1

",

Distance = 30km

Speed = 60km/hr

Time taken = distance / speed

=30/60

=0.5 hrs

Case 2

Distance = 30 km

Speed = 40km /hr

Time taken = 30/40

= 0.75 hrs

Total time taken in the whole journey equals to......

0.5 hrs + 0.75 hrs

= 1.25 hrs

Which equals to...... I hour and 15 minutes

Hope it helps!!!!!

Answer 2

Answered

A car travels 30km at a uniform speed of 40km/h and the next 30km at a uniform speed of 30km/h. Find its average speed.

Time taken to cover first 30 km = 30/40 = 3/4 = 0.75hr

Time taken to cover next 30 km = 30/30 = 1 hr

As we know average speed = total distance/total time

So avg speed = 60/(1+0.75) = 60/1.75 = 34.29 km/hr