Question

Find the cost of canvas required for a conical tent whose height is 8m diameter 12m at rate rs 3.50 per square

Answer 1

height is equal to 8m
diameter is equal to 12m
therefore radius is equal to 6 m
FIRST STEP :
to find the slant height of the conical tent:
slant height (l) =
$\sqrt{ {r}^{2} \: + {h}^{2} }$
$\sqrt{ {6}^{2} \: + \: {8}^{2} }$
$\sqrt{36 \: + 64}$
$\sqrt{100}$
slant height = 10

SECOND STEP :
to find the curved surface area:
$\pi \: r \: l \:$
22/7 × 6 × 10 = 188.57
cost = 188.57 × 3.50
= 659.99

Answer 2

Answer:

660

Step-by-step explanation:

Given that conical tent of canvas height is 8m and diameter of base is 12m.

Then, radius of base =12/2=6m.

Therefore, area of conical tent =πr(r²+h²)

=22/7×6×(8)2+(6)2⇒60×22/7cm².

If cost of canvas is 3.50 per sq. cm,

then cost of canvas=60×22/7×3.5=Rs.660.