A mansion has 12 right cylindrical pillars each having radius 50cm and height 3.5m.find the cost to paint the lateral surface of the pillars at Rs.20 per square metre
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Step-by-step explanation:
No. of pillars = 12
r = 50cm
= 0.5m
Rate=20rs/m²
C.S.A= 2πrh
=2*22/7*3.5*0.5
=2*22/7*3.5*1/2
=11m²
C.S.A of 12 such pillars = 11*12
= 132m²
Cost for painting 12 such walls = Total C.S.A*Rate
= 132*20
= Rs 2,640
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Answer:
Total cost = Rs . 2640
Step-by-step explanation:
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