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