Question

A tent is in the shape of a cylinder surmounted by a conical top the cylindrical part is 2.1m high and conical parthas slant height 2.8m both the partshave same radius 2m.find the area of canvas used to make the tent​

Answer 1

Given:

Height (h) of the cylindrical part = 2.1 m

Diameter of the cylindrical part = 4 m

Radius of the cylindrical part = 2 m

Slant height (l) of conical part = 2.8 m

Area of canvas used = CSA of conical part + CSA of cylindrical part

=πrl+2πrh

=π×2×2.8+2π×2×2.1

=2π[2.8+4.2]

=2×

7

22

×7

=44m

2

Cost of 1 m

2

canvas =500 rupees

Cost of 44 m

2

canvas =44×500=22000 rupees.

Therefore, it will cost 22000 rupees for making such a tent.