Question

how long will be a athletic take to cover 200 mt. if his speed is speed is 30 km/hr.​

Answer 1

Answer:

First, let us find the distance.

Distance = Speed × Time.

The speed is 12 km/hr and time is 30 minutes or 0.5 hours.

So, Distance = 12 *0.5 = 6 km.

To cover the distance 5 minutes early, he should cover this distance in 25 minutes or 5/12 hours.

Now, Speed = Distance ÷ Time.

So, Speed = 6 km ÷ (5/12) hours = 14.4 km/h.

Current speed is 12 km/h, and required speed is 14.4 km/h.

Therefore, he should increase his speed by 14.4–12 = 2.4 km/h.