Question

one base cylinder 154cm height of cylinder is twice of radius find curved surface area, total surface area and volume​

Answer 1

tsa of cylinder is 2pierhsquare

Answer 2

GivenHeight of cylinder (h)=21cm

Area of its one end =154cm²

πr²=154

$⇒ \frac{22}{7} \times {r}^{2} =154$

${r}^{2} = \frac{154×7}{22}$

$= \frac{1078}{22} =49$

$r= \sqrt{49}= \sqrt{7 \times 7}</p><p>$

$r = 7cm$

Volume of cylinder =

${\pi r}^{2} h = \frac{22}{7} ×7×7×21$

$=22×7×21$

$=3234 {cm}^{3}$

Curved surface area =

$2\pi rh=2× \frac{22}{7} ×7×21$

$=2×22×21$

$=924 {cm}^{2}$

Hence, the volume of cylinder =3234cm³

Hence, the volume of cylinder =3234cm³Curve surface area =924cm²