Question

Answer my question with solution........ ​

Answer 1

Answer:

314pi cm^2  or 986.46 cm^2

Step-by-step explanation:

cone volume formula = 1/3 * pi*r^2* h

v = 1570 cm^3 and height = 15cm

area of base? area of circle base = pi*r^2

1570 = 1/3*pi*r^2 * 15

r^2 = 1570(3/1)(1/15)

r^2 = 314

now plug value to the formula for circle base

C_area = pi(314)

Answer 2

Answer :-

Step by step explation :-

We have :

Height of cone = 15 cm

Volume of cone = 1570 cm^3

To Find :

Area of base = (?)

Find radius of base :

$\frac{1}{3} \pi {r}^{2} h = 1570 {cm}^{3} \\ \\ \frac{1}{3} \times \frac{22}{7} \times {r}^{2} \times 15 = 1570 \\ \\ {r}^{2} = \frac{1570 \times 3 \times 7}{22 \times 15} \\ \\ {r}^{2} = 100 \\ \\ r = \sqrt{100} = 10 \: cm$

Area of base :

$= \pi {r}^{2} \\ \\ = \frac{22}{7} \times 10 \times 10 \\ \\ = 314 {cm}^{2}$