Question

A cubical block of side 10cm is surmounted by a hemisphere what is the largest diameter that the hemisphere can have find the cost of painting the total surface area of the solid so formed at the rate of 5 per 100sqcm

Answer 1

Answer:

rs  33.93

Step-by-step explanation:

The greatest diameter the hemisphere can have i 10cm

T.S.A of the solid = surface area of the cube +CSA of the hemisphere - area of the base of the hemisphere

=6×102+2×227×5×5−227×5×5

=600+227×25

=600+78.57

=678.57cm2

∴ Cost of printing the block at the rate of Rs5/100 square is

100sq.cm=5

678.57=?

67.57100×5=33.93

Hence the amount is Rs.33.93