Question

A solid rectangular piece of iron measures 1.05m by 70cm by1.5cm. Find the weight of this piece in kilograms if 1cm by cm by cm by of iron weight 8 grams.

Answer 1

Ans: ) $<b><i>$Vol. of a rectangular block of iron = L* B* H  { L= length , B= Breadth , H = height}

L = 1.05 m= 105 cm

B= 70 cm 

H= 1.5 cm

therefore, Vol = 105 * 70 * 1.5 = 11025 cm3

The weight of 1 cm3  of iron plate is 8 gram

Therefore, the weight of 11025 cm3 of iron plate is = 11025 * 8 = 88200 grams.

weigtht in Kg = 88200/1000 = 88.2 kg.