the volume of a cylinder of height 8cm is 1232cm . find its curved surface area and the total surface area
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Answered by
10
volume of cylinder=πr^2h
1232=22/7*r^2*8
1232*7/22*8=r^2
7*7=r^2
r=7
CSA=2πrh
2*22/7*7*8. = 352
TSA=2πr(h+r). = 2*22/7*7(7+8)
= 660
1232=22/7*r^2*8
1232*7/22*8=r^2
7*7=r^2
r=7
CSA=2πrh
2*22/7*7*8. = 352
TSA=2πr(h+r). = 2*22/7*7(7+8)
= 660
sneha198:
we know that volume of cylinder= πr^2h
by applying πr^2h formula,we will get the value of r
now apply the formula of CSA of cylinder
2πrh
and tsa of cylinder
2πr(h+r)
now answer have come
understood or not
i understand thanku sneha
your most welcome
Answered by
8
heya folk !!!
this is too easy ☺
volume of cylinder =πr2^h【where R is radius and h is height if cylinder 】
but here volume of cylinder is given..
so,,πr2h=1232
=)22/7*r^2*8=1232
=)r^2=1232*7/22*8
=)r^2=49
=)r=7
,now,,,,,, curved surface area of cylinder is
=2πrh
=)2*22/7*7*8
=)352
and again ,as you know that total surface area of cylinder means .sum of curved surface area of cylinder and area of the base of both cylinder
=)2πrh+πr^2
=)2*22/7*8+22/7*7*7
=)22/7*7(8+7)
=)22(15)
=)6600Ans .
hope it help you.
@rajukumar ☺☺☺
this is too easy ☺
volume of cylinder =πr2^h【where R is radius and h is height if cylinder 】
but here volume of cylinder is given..
so,,πr2h=1232
=)22/7*r^2*8=1232
=)r^2=1232*7/22*8
=)r^2=49
=)r=7
,now,,,,,, curved surface area of cylinder is
=2πrh
=)2*22/7*7*8
=)352
and again ,as you know that total surface area of cylinder means .sum of curved surface area of cylinder and area of the base of both cylinder
=)2πrh+πr^2
=)2*22/7*8+22/7*7*7
=)22/7*7(8+7)
=)22(15)
=)6600Ans .
hope it help you.
@rajukumar ☺☺☺
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