a tent of plastic and other combustile material is of shape of right circular cylinder of height 9 and above it a cone of 15 m the diameter of cylinder as well as of surmounted headphone is 16m compute cost of painting the inner side of the tent at rate of rupees 20 per square metre
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The cost of painting the inner side of the tent at rate of rupees 20 per square metre is 16594.2 Rs
Step-by-step explanation:
Area that is to be painted.
Area to be painted = CSA of cone + CSA of cylinder
Area to be painted = πrl + 2πrh
Area to be painted = π .r ( l + h)
= 22 / 7 x 8 ( 15+ 18)
= 22 / 7 x 8 x 33
Area to be painted = 5808 / 7 = 829.71 m^2
Now cost of painting = 829.71 x 20 = 16594.2 Rs
Hence the cost of painting the inner side of the tent at rate of rupees 20 per square metre is 16594.2 Rs
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The area of a rectangular playground is 4800 m^2. Find the cost of covering it with gravel 1 cm deep,If the gravel costs ₹260 per cubic metre. ?
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Answer:
Cost of painting the inner side of the tent is 17600 Rs
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