Question

a brick has dimension 10cm X 6cm X 5cm. if 1cmcube of brick material weights 5g,find the weight of 8 bricks.

Answer 1

volume of brick = l×b×h
=10×6×5=300cm²

weight of 1 brick= 300cm²×5g=1500g

weight of 8 bricks=1500×8=12000g=12kg

Answer 2

Dimensions of brick = 10cm×6cm×5cm 
Therefore, Volume of one cube = 10×6×5 cm³
                                                  = 300 cm³
                     Weight of 1 cm³ = 5g  
Therefore, weight of 300 cm³(1 brick) = 5 × 300 
                                               = 1500g or 1.5Kg 
Now weight of 8 bricks =1.5 Kg × 8 = 12 Kg         
                                     Thank You!!!! Hope this helps!!!!