Question

# In the first half of the journey a bus travelled with an average speed of 20 km/hr. If the given average speed for the complete trip made by the bus is 24 km/hr, then calculate the average speed covered by the bus in the second half of the trip.

Hint:

### Let the distance of entire journey is D

Distance in half journey = D/2

Let the time taken by bus to cover the 2nd half of the journey be x kmph .

By using Time = (distance )/ Avg. speed

Find the total time ,and time covered in 1st half and time covered in 2nd half

We know total time = time covered in 1st half + time covered in 2nd half

## The correct answer is: 30kmph.

### Ans :- The average speed covered by bus in the second half of the journey = 30kmph.

Explanation :-

Avg. Speed in 1 st half of journey is 20kmph

Avg. Speed in entire journey is 24 Kmph

Let the time taken by bus to cover the 2nd half of the journey be x kmph .

Step 1:- Find the total time ,and time covered in 1st half and time covered in 2nd half.

=

=

=

Step 2:- Equating total time taken in journey.

Total time = time covered in 1st half + time covered in 2nd half

∴The average speed covered by bus in the second half of the journey = 30kmph.

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