The slant height and base diameter of a conical tomb are 25m and 14m respectively. What is the cost of whitewashing its curved surface area at the rate of Rs.210 per 100sq.m?
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curved surface area= πrl
given slant height = 25m
radius =14/2 =7
curved surface area of tomb =( 22/7×7×25) m²
=(22×25)m². =550m²
cost of whitewashing of 100m²= 210₹
cost of whitewashing of 1m² = 210÷100
cost of whitewashing of 550m²= 210/100×550 = 1115₹
given slant height = 25m
radius =14/2 =7
curved surface area of tomb =( 22/7×7×25) m²
=(22×25)m². =550m²
cost of whitewashing of 100m²= 210₹
cost of whitewashing of 1m² = 210÷100
cost of whitewashing of 550m²= 210/100×550 = 1115₹
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