Question

A car takes 5 hours to reach a destination by travelling at the speed of 72 km/h. How long will it take if the car travels at the speed of 90 km/h?​

Answer 1

Answer:

Step-by-step explanation:

If the speed of the car is more, time required is less to travel.

Therefore it’s inversely proportional.

Let us consider the required time be x hours

5 × 72 = 90 × x

x = (5 × 72) /92

= 3.91

∴ 4 hours are required.

Answer 2

Step-by-step explanation:

5×72=90*×

×=(5×72)/92

=3.91

4 hours are requried

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