Question

A military tent of height 8.25m is in the form of a right circular cylinder of base diameter 30m and height 5.5m surmounted by a right circular cone of same base radius find the length of canvas used in making the tent, if the breadth of the canvas is 1.5m

Answer 1

Answer:

Explanation:

Height of the cone = 8.25 - 5.5= 2.75 m

Slant height of the cone (l)= Under root h2 + r2 = 15.25

surface area of cone= πrl = 3.14 × 15 × 15.25= 718.3

surface area of cylinder = 2πrl = 2 × 3.14 × 15 × 5.5= 518.1

area of canvas used = 718.3 + 518.1 =1236.4

length of canvas = 1236.41.5=824.26 m