Question

4. Find the ratio of the total surface area and the lateral surface area of a cylinder whose radius
15 cm and length is 23 cm​

Answer 1

Hlw Dude!!

QUESTION :-

Find the ratio of the total surface area and the lateral surface area of a cylinder whose radius  15 cm and length is 23 cm​

ANSWER :-

T.S.A. of Cylinder = 2 π r ( h + r)

L.S.A. of Cylinder = 2 π r h

Radius = 15 cm

Length (Height) = 23 cm.

$\bf\frac{TSA}{LSA}\bf{=}\bf\frac{ 2\pi\:r(h + r)}{2\pi\:rh}$

$\implies\bf\frac{TSA}{LSA}\bf{=}\bf\frac{ (h + r)}{h}$

$\implies\bf\frac{TSA}{LSA}\bf{=}\bf\frac{(23 + 15)}{23}$

$\implies\bf\frac{TSA}{LSA}\bf{=}\bf\frac{38}{23}$

$\implies\bf{TSA:LSA=38:23}$

Hope this answer can helps !!