A mansion has 12 cylindrical pillars each having the circumference of 50 cm and height of 3.5mtr find the cost of painting the lateral surface area of pillars at the price of (rupees)20 per square metre
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Answer:
420 rupees.
Step-by-step explanation:
I think you knew the formula
So I'm writing short form.
[ Given,circumference=50cm
2pir =0.5m]
Ar = 2pirh ×12
=> 0.5(3.5) ×12
=>1.75m² ×12
=>21
And also given,for painting m²= 20 rupees
Then for 21m² => 21×20
=> 420.//
So we got that 420 rupees is the price for 12 pillars painting.
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