A tent is in the form of a cylinder of diameter 4.2 m and height 4 m, surmounted by a cone of equal base and height 2.8 m. find the cost of canvas for making the tent at ₹ 100 per sq.m.
The correct option is B Rs.(7590)
The total surface area of the tent:
Where π=227;r=2.1 m
h1=height of the cylinder=4 m
h2=height of the cone=2.8 m
l=slant height of the cone=√
So, T=(2×227×2.1×4+227×2.1×3.5) m2
Therefore the cost of canvas for making the tent at ₹ 100 per sq meter =75.9×100=₹7590.