Question

a solid cylinder has total surface area of 48r cm². Its total surface area is 8/5 times of its curved surface are. Find the radius of the cylinder​

Answer 1

Step-by-step explanation:

TOTAL SURFACE AREA OF THE CYLINDER(TSA)=462CM²

SURFACE=1/3 OF TSA

=1/3 X 462

=154CM²

AREA OF EACH CIRCLE=(462-154)/2

=154CM²

PI×R²=154

R²=49

R=7

2PI×R×H=154

H=154×7/22×7

H=3.5

VOLUME=PI×R²×H=22/7×49×35/10

VOLUME=539CM³

Answer 2

Answer:

TOTAL SURFACE AREA OF THE CYLINDER(TSA)=462CM²

SURFACE=1/3 OF TSA

=1/3 X 462

=154CM²

AREA OF EACH CIRCLE=(462-154)/2

=154CM²

PI×R²=154

R²=49

R=7

2PI×R×H=154

H=154×7/22×7

H=3.5

VOLUME=PI×R²×H=22/7×49×35/10

VOLUME=539CM³

Step-by-step explanation: