Answer / faraheem

only having strength u can't predict the area
and u are not mentioning only concrete block u can't get
the real area if it is a cube of 200mm then wt will be 19.2
kg

Answer / prem

here strength is given,so we can find resp ratio of
cement:sand:aggregate.hence multiplying resp. vol. with
their unit wt we can cal the wt of the conc block.

Answer / vijendra singh

50 kg/sq cm,
30 kg/sq cm

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