Question

find the height of a cylinder whose radius is 7cm and total surface area is 968cm also find the volume​

Answer 1

$\pi {r}^{2} h = 968$

$\frac{22}{7} \times 7 \times 7 \times h = 968$

$7h = 44$

$h = \frac{44}{7}$

Answer 2

Answer:

total surface area of cylinder=2πr(r+h)

968cm²=2π7(7+h)

(968×7)/(2×22×7)= 7+h. (7 cut with 7)

968/44=7+h

22=7+h

22-7=h

15cm=h

volume of cylinder=πr²h

$\frac{22}{7} \times {7 }^{2} \times 15 \\ \frac{22}{7} \times 49 \times 15 \\ 22 \times 7 \times 15 \\ = 2310cm {}^{2}$