Question

the volume of a cylinder of height 8cm is 1232 cube cm. find the curved surface area and the total surface area​
plz... urgent

Answer 1

$volume = 1232 = \pi {r}^{2}h \\ 1232 = \pi {r}^{2} \\\pi {r}^{2} = 1232 \div 8 = 154 \\ {r}^{2} = (154 \times 7) \div 22 \\ {r}^{2} = 7 \times 7 \\ r = 7cm$

CSA=

$csa = 2\pi \times r \times h$

={(2×22)÷7}×7×8

44×8=352 cm^2

TSA=

$tsa = 2\pi \times r(r + h)$

={(2×22)÷7}× 7(7+8)

44(15)

=44×15=660 cm^2