Question

the height of the cylinder pipe is 10 M and its diameter is 63 M find the expenditure of painting is curved surface if the rate of the painting is 1 Rupee per square metre

Answer 1

hello!!

here's ur answer...

given the length (height) of the cylinder is 10m.

in cm=10×100=1000cm

diameter of the cylinder=63cm

therefore radius=63/2cn

CSA of the cylinder=2πrh

=2×22/7×63/2×1000

=2×11×9×1000

=22×9000

=198000cm²

in metres=198000/100

=1980m²

if per m² costs₹1 then 1980m² costs=1980×1

=₹1980

hence, the total cost of painting is ₹1980.

hope this helps...