How many times, correct to the nearest whole number, will a man run round a circular track of diameter 100m to cover a distance of 1000m?
-
3
- 4
- 5
- 6
The correct answer is: A
Explanation
In terms of distance, a circle has a total distance or perimeter of 2ฯr or ฯd
Where r is radius and d is the diameter
So perimeter = \(\frac{22}{7}\) x 100
= 314.2857m
To cover a distance of 1000m, he is going to round the circular track for \(\frac{1000}{314.2857}\) = 3.18
\(\approxeq\) 3 (to the nearest whole number)
There is an explanation video available .