Question
A circular wheel makes 80 revolutions to cover 7.04 km.
What is its diameter? (Take π = 22/7)Solution
ATQ,
7.04 km = 7.04 × 1000 = 7040 metres
Circumference of the wheel = 7040 ÷ 80 = 88 metres
Let the radius = x metres
Circumference = 2πr
ATQ:
88 = 2 × (22/7) × x
x = 14
Diameter = 2 × 14 = 28 metres
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