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bhobarnob

· started a discussion

· 1 Months ago

i could not understand (Question: 274728.0 )

someone plz explain

Question:

From a solid cylinder of height 4 cm and radius 3 cm, a conical cavity of height 4 cm and radius 3 cm is hollowed out. What is the total surface area of the remaining solid?

Options:
A)

15 π     sq.cm

B)

22  π    sq.cm

C)

33  π    sq.cm

D)

48  π    sq.cm

Solution:

Ans: (d)

  

ASHISH

· commented

· 1 Months ago

Radius and height are same, total surface area of remaining portion is= c.s.a of cylinder + area of top portion of cylinder + c.s.a of cone. 24π+9π+15π
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