Question

The vertical height of a right circular conical tent is 4 m and the volume of space inside it is 138 2/7 m3. Find the canvas required to make the tent. Also find the cost of canvas at the rate of rs 120 per m2.

Answer 1

Given, h= 4m
V= $138 \frac{2}{7} m^3$ = $968 m^3$
V(cone)= $\frac{1}{3} \pi r^2h$
$968= \frac{1}{3} * \frac{22}{7} *4*r^2$
$\frac{968*7*3}{22*4} =r^2$
$231=r^2$
$r= \sqrt{231} =15.19m$
We know, $l= \sqrt{r^2+h^2} = \sqrt{(15.19)^2 + 4^2}$
=$\sqrt{230.7361+16} = \sqrt{246.7361} =15.7 m=l$
Area of canvas=CSA=$\pi rl= \frac{22}{7} *15.19*15.7$
CSA= $749.518 m^2$
Cost= 
$120*749.518$
=Rs 89942.16

Answer 2

Step-by-step explanation:

dear your answer is absolutely wrong