The shaded portion in the figure alongside is a racing track used by athletes
for training. The outer and the inner radii of the grounds are 8 m and 5 m
respectively. Find the area of the racing track.
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Answer:
858/7 m² or 122.46 m²
Step-by-step explanation:
Area of outer circle = πR²
=> 22/7 × 8 × 8
=> 1408/7 m²
Area of inner circle = πr²
=> 22/7 × 5 × 5
=> 550/7 m²
Area of shaded region = 1408/7 - 550/7
=> 858/7 m²
Hope it's helpful :) :)
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