Question

A cylindrical pillar is 100 cm in diameter and 2.5
in height. Find the cost of painting curved surface di
the pillar at the rate of * 12.50 per m².​

Answer 1

Rate of painting the pillar at ₹12.50/m² will be ₹0.982

Step-by-step explanation:

Volume of cylinder= πr²h

Total Surface Area of cylinder= 2πr(h+r)

Given that, Height=2.5cm=>0.025m

Diameter=100 cm,

so radius= 50 cm=>0.50m

So now A.T.Q,

We know that

Curved surface area of cylinder=2πrh

C.S.A of cylinder=2×π×0.50m×0.025m

C.S.A= 0.025πm²

Now, The cost of painting per m²= ₹12.50

So the cost of painting 0.25m²= 12.50×0.025m²×22/7 => ₹0.982

Answer:- Hence, the rate of painting the pillar at rupees 12.50/m² will be ₹0.982

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