Question

A cap of paper sheet closed at the top is in the form of a right circular cylinder of radius 6cm and
height 0.1m. Find the cost of 140 caps if the cost of paper sheet is Rs 70 per square meter.​

Answer 1

Answer:

radius=6cm=0.06m

height=0.1m

we are given that it is a cap of paper....so it is open from down

so,

surface area=Πr^2+2Πrh

=22/7×0.06(2×0.06+0.1)

=0.041