Question

A vessel is in conical shape . If it's volume is 33.264 litres and height is 72cm , the cost of repairing it's CSA at ₹12/sq m is ?

Answer 1

Answer:

Volume=33264cm3

Volume of cone=1/3πr 2h

33264=1/3πr 2h

33264=I/3πr 2x72

33264x3x7

= 22xr 2x72

r2=33264 X3X7/22x72=441

r =v441 = 21

sl.ant height l=vr^2+h^2

=v 21^2+72^2 = 75

I=75cm

CSA= πrl=22/7x21x75=4950cm2

cost of repair=4950x12/10000=5.94

Rs. 5.94. ( :10000cm2 = Im2)