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A horse is tethered to a corner of a square field of side 15 m by a 7 m rope. The area the horse can graze is
A49 sq m
B77 sq m
C154 sq m
D38.5 sq m
Answer & Solution
Correct answer: D. 38.5 sq m
1. Horse sweeps a quadrant (90 degree sector) at the corner.
2. Area = (90/360) × (22/7) × 7 squared = (1/4) × 154.
3. Area = 38.5 sq m.
_Source: NCERT Class 10 Mathematics, Ch 11 "Areas Related to Circles", §11.2_
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