Question

Find the cost of digging a well 2 m in radius and 14 m deep at the rate of rs 4.80 per m^3

Answer 1

given
radius of cylinder - 2
h of cylinder 14

therefore TSA =
2πr(h+r)
putting values
ans = 201•14

cost = 201•14×4•8= 965•472
if the following solution is wrong than sorry.

Answer 2

volume volume of right circular cylinder =πr²h

radius is = 2 metre

height = 14 metre

so volume =(22/7*2*2*14)m³

=176m³

cost of per m³ digging=rs4.80

cost of 176 m³ digging=rs(176*4.80)

=rs844.8