it's urgent, please answer it please
Suppose in the water tank there are 4 cylindrical pillars. The radius of each pillar 28 cm and height
is 4 m.Find the total cost of painting the curved surface area of all pillars at the rate of Rs.8 per m2
.
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Answer:
₹22528
Step-by-step explanation:
Radius= 28 cm
Height= 4m = 400 cm
LSA= 2×pie×r×h
= 2×22/7×28×400
= 70400 cm
The LSA of one pillar is 70400 cm
The LSA of 4 pillars is 70400×4 = 281600cm
The cost of one pillar is in metre so the LSA of 4 pillars is 281600cm=2816m^2
Cost of 1 pillar=₹8
Cost of 4 pillar=2816×8= ₹22528
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