Question
The inner and outer radii of a circular track are 28 m
and 25 m, respectively. The cost (in βΉ) of levelling the track at βΉ28 per mΒ² is: [UseΒ Ο = 22/7]Solution
Area outer β= 22/7 β Γ28 Γ 28 = 2464 sq m Area inner = 22/7 Γ 25 Γ 25 = 1964.29βsq m Area track = 2464 β 1964.29 = 499.71βsq m β Cost = 499.71 Γ 28 = βΉ13,991.88 β 13992
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