Question

A circular tent is cylindrical to a height of 4 m and conical above it. If its diameter is 210 m and its slant height is 40m. The total area of the canvas required in m2 is 

1760

15840

3960

7960​

Answer 1

Step-by-step explanation:

for cylinder

Diameter is=210

then radius =210/2

height=4

For cone

l= 40

r=210÷2

Total surface area of the tent is the sum of lateral surface of cone and cylinder

2πrh+πrl

2×22/7×210/2×4+22/7×210/2×40

2640+13200

-->15840