Q3 of 32 Page 255

A medicine capsule is in the shape of a cylinder with two hemispheres stuck to each of its ends. The length of the capsule is 14 mm. and the width is 5 mm. Find its surface area.

Given that, the length of the capsule is 14 mm and the width is 5 mm.

⇒ Radius(r)


⇒ height of cylinder(h) = total height-2 × radius of hemisphere


= 14-5 = 9mm


⇒ surface area of capsule = surface area of cylinder + 2 × surface


Area of one hemisphere


= 2πrh + 2 × 2πr2


= 2πr(h + 2r)




= 220 mm2


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