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RS Aggarwal Solutions Class 7 Mathematics Solutions for Mensuration Exercise 20F in Chapter 20 - Mensuration
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Question 8 Mensuration Exercise 20F
A horse is tied to a pole in a park with a string 21 m long. Find the area over which the horse can graze.
Answer:
From the question,
Horse is tied to a pole, then the pole will be the central point and the area over which the horse will
graze will be a circle. The string by which the horse is tied will be the radius of the circle.
Then,
Radius of the circle, r = length of the string = 21 m
Then, area of the circle = \pi r^{2}
= (22/7) × 21 × 21
= 22 × 3 × 21
= 1386 \mathrm{m}^{2}
Hence, the area of the horse can graze is 1386 \mathrm{m}^{2}.
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