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55. Weight of a cuboid made of metal is500 kg. If all its dimensions are made of20% of the dimensions of previous one,then what will be the weight of the newcuboid? |
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Answer» Weight is directly proportional to volume when density is constant.In the both cases the density is same so weight is directly proportional to volume.VOLUME IS DIRECTLY PROPORTIONAL TO WEIGHT. VOLUME OF CUBOID = L*B*HSo, W1/W2=V1/V2W1=500KGV1=L*B*HW2=?V2=(20% of L)*(20% of B)*(20% of H)V2=(20/100*L)*(20/100*B)*(20/100*H)V2=(1/125)(L*B*H)V2=(1/125)(V1) W1/W2=V1/V2500/W2=V1/((1/125)*V1)500/W2=125W2=500/125=》 W2= 4KG |
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