1.

Find the volume and the surface area of a sphere of radius 3.5 cm.

Answer»

Solution :Volume = `4/3 pi r^3`
=`4/3 XX (22)/7 xx 3.5xx3.5xx3.5 = 179.66cm^3`
Surface area = `4pi r^2`
=`4XX(22)/7 xx3.5xx3.5 = 154 cm^2`


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