the running track is encloced between two concentric circles of radii 42m and 49m. find the cost of cementing the track at the rate of ₹25 per m2
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Area of running track =22/7(R2-r2)
Area =22/7(49*49-42*42)
Area =22/7(2401-1764)
Area =22/7*637
Area =22*91=2002m2
cost of cementing =25*2002=50050rupees
Area =22/7(49*49-42*42)
Area =22/7(2401-1764)
Area =22/7*637
Area =22*91=2002m2
cost of cementing =25*2002=50050rupees
babitha2:
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