Given
r = 7m
h = 1m
Surface area of hemisphere = 2πr2
=2×227×(7)2 = 308 m2.
For calculating the surface area of a cone we need to calculate its slant height,
l = √r2+h2
l = √49+1=√50 m.
Surface area of cone = πrl= 227×7×√50 = 155.39 m2.
So, area of cloth required = (308 + 155.39)m2 = 463.39 m2