Four identical cones each of radius 10.5 cm and height 14 cm

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SSC CGL Tier-2 9-March-2018 Maths Shift-2
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41

M: +3.00/-0.00

Four identical cones each of radius 10.5 cm and height 14 cm are cut from a cuboid of dimensions 30cm×32cm×40cm (base of each cone lies on the surface of cuboid). What is the total surface area (in cm²) of the remaining solid?

[SSC CGL Tier-2 9-March-2018 Maths Shift-2]

A 6528

B 7804

C 5926

D 6824