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: syllabus Mathematics, Ch 11 "Areas Related to Circles", §11.2_

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