Asked by Anonymous
A cylindrical can has hemispherical cap. The cylinder and hemisphere are of radius3.5cm. The cylindrical part is 20cm tall. Taking to22/7.calculate. a)the area of the circular base. b)the area of the curved cylindrical surface? The total surface area
Answers
Answered by
oobleck
Just use your usual formulas.
(a) πr^2
(b) 2πr^2
(c) πr^2 + 2πrh + 2πr^2
(a) πr^2
(b) 2πr^2
(c) πr^2 + 2πrh + 2πr^2
Answered by
JAC OB254
a)
A=#r^2
=22/7×3.5×3.5
=38.5cm^2
b)
curved surface area=2#rh
=2×22/7×3.5×20
=440cm^2
c)area of the hemispherical part= 2#r^2
=2×22/7×3.5×3.5
=77cm^2
total surface area= 38.5+440+77
=555.5cm^2
A=#r^2
=22/7×3.5×3.5
=38.5cm^2
b)
curved surface area=2#rh
=2×22/7×3.5×20
=440cm^2
c)area of the hemispherical part= 2#r^2
=2×22/7×3.5×3.5
=77cm^2
total surface area= 38.5+440+77
=555.5cm^2
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