This is one of the important question from the cbse board exam because this question was asked in 2014 cbse board exam; Question number 33 from RS Aggarwal book page number 829, exercise 17D, chapter volume and surface area of solid.
Deepak BoraNewbie
The interior of a building is in the form of a right circular cylinder of diameter 4.2 m and height 4 m surmounted by a cone of same diameter. The height of the cone is 2.8 m. Find the outer surface area of the building.
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