A circular running track has an inner circumference of 352 m, and the track itself is 7 m wide all the way round. Find the area of the track in m2. Take π = 22/7.
Competition practiceAreas & Volumes
A154
B2618
C308
D12474
Step-by-Step Solution
2×(22/7)×r=352 gives r=56m, so the outer radius R=56+7=63m. Track area = π(R2−r2)=(22/7)(3969−3136)=(22/7)×833=22×119=2618m2.
Answer: B) 2618
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