Question

a cuboidal metal block of dimensions 20 cm into 16 cm into 12 CM weighs 6 kg find the weight of a block of the same metal of size 10 cm into 8 cm into 8 cm

Answer 1

volume=lbh=20*16*12=3840 cu.cm
3840 cu.cm=6 kg
1 cu.cm=6/3840=3/1920=1/640 kg
volume of new cuboid=lbh=10*8*8=640 cu.cm
we found that,1 cu.cm=1/640 kg
   therefore,640 cu.cm=1/640*640 kg
                                     =1 kg
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