Question

A car travels 60 km in half an hour. How much time is required to cover 30 km with the same speed? 
a) 20 minutes
b) 30 minutes
c) 15 minutes
d)60 minutes
​

Answer 1

time taken to cover 60km = 60+30 = 90min

now time taken to cover 1km = 90/60 = 3/2 min

Therefore time taken to cover 100km =100×3/2= 150 min or 2hrs 30min

YOUR ANSWER IS 30MIN

Answer 2

The time required to cover 30 km with the same sp will be 15 minutes (option c).

Given,

Distance covered = 60 km

Time taken = half an hour

To find,

The time required to cover 30 km with the same speed.

Solution,

The time required to cover 30 km with the same sp will be 15 minutes.

We can easily solve this problem by following the given steps.

According to the question,

Distance covered by car = 60 km

Time taken = half an hour (0.5 hours)

We know that the formula to find the speed is as follows:

Speed = distance/time taken

Speed = 60/0.5

Speed = 600/5

Speed of car = 120 km/h

Now, in the new case, the distance is 30 km and we have to find the time.

Time taken = Distance/speed

Time = 30/120

Time = 1/4 hour (Converting the fraction into the simplest form)

Now, we know that in an hour there are 60 minutes.

1 hour = 60 minutes

1/4 hour = (60/4) minutes

1/4 hour = 15 minutes

Hence, the time required to cover 30 km with the same speed is 15 minutes.