Question

A man walks around a circular park 4 times in 12 minutes the radius of the park is 49 m Find the speed of the man in km/h.

Answer 1

First, we need to find the total distance travelled.
Given that he walks round the park four times.
So if we find the circumference of the park and multiply it by 4, we get the total distance travelled.
Circumference=2πr
=2*(22/7)*49
=44*7
=308m
Total distance travelled=308*4=1216m.
Given that, he travels this distance in 12 minutes.
So,
Speed=distance travelled/time taken
=1216m/12min
But they want the speed in km/h. So if we convert the distance into Kms and time taken into hours, and then calculate the speed, we get the required answer.
1216m=1216/1000=1.216km
12 minutes=12/60=0.2hr
So,
Speed=1.216/0.2=6.8km/h.

Answer 2

Answer:

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Step-by-step explanation:

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