UPSC CDS 2 2021 Math Paper

Given, length of side of cubical block, a=14cm
Radius of hemisphere, r=7cm
Total surface area of the solid so formed
= total Surface area of cube + curved Surface area of hemisphere - circular base area of hemisphere.=6×(a)2+2πr2−πr2
=6×142+πr2
=6×196+‌

22

7

×7×7
=1176+154=1330cm2