Question

iron piece having outer radius 4 cm is 5 m long its curved surface has to be painted find the cost of painting it ar rate of ₹ 14 per sq m

Answer 1

Hey there,

here's ur answer...

given the radius of the iron piece is 4cm and height (length) is 5m.

radius in metres=4/100

=0.04m

CSA of the iron piece=2πrh

=2×22/7×0.04×5

=8.8/7m²

total cost of painting if per m² costs ₹14

=8.8/7×14

=8.8×2

=₹17.6

₹17.6....ans

hope this helps..!

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