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side of cube =6cm
radius of hemisphere=2.1cm
t.s.a of block =t.s.a of cube +t.s.a of hemisphere
=6a^2+3πr^2
=6*6^2+3*22/7*2.1*2.1
=216+13.86
=229.86
volume of block=volume of cube+volume of hemisphere
=a^3+2/3πr^3
=6^3+2/3*22/7*2.1^3
=216+19.404
=235.404
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