Question

the ratio of total surface area to lateral sirface area of a cylinder whose radius is 80 cm and height 20 cm is

Answer 1

Answer:

Step-by-step:

2 pie r(r+h) =total surface area-1

2 pie r h = lateral surface area-2

Divide 1 by 2

You get r+h/r

80+20/80

100/80

5:4

Answer 2

GIVEN :

• RADIUS AND LATERAL SURFACE AREA (LSA) OF CYLINDER IS 80 cm AND 20 cm

TO FIND :

1. RATIO OF TOTAL SURFACE AREA TO LATERAL SURFACE AREA OF CYLINDER

SOLUTION :

$lateral \: surface \: area \: of \: cylinder (lsa)= 2\pi rh \\ \\ total \: surface \: area \: (tsa)= 2\pi r(r + h) \\ \\ tsa : lsa \: = 2\pi r(r + h ): 2\pi rh \\ \\ = (r + h) : \: h \\ \\ = (80 + 20) : 20 \\ \\ = 100 :20 = 5 : 1$

HOPE IT HELPS !!!!