A piece of cloth is required to completely cover a solid object. The solid object is composed of a hemisphere and a cone surmounted on it. If the common radius is 7 m and height of the cone is 1 m, what is the area of cloth required?
463.39 m2
Surface area of hemisphere = 2πr2 = 2π(7)2 = 308 m2.
For calculating the surface area of a cone we need to calculate its slant height,
l = √49+1=√50 m.
Hence surface area of cone = πrl = 155.39 m2.
So, area of cloth required = (308 + 155.39)m2 = 463.39 m2