Question

the outer Length breadth and height for the wooden box with lid is 1.25 m 0.80 metre in 0.55 m. thickness of wood is 2.5 cm. if the weight of 1 cubic metre wood is 250 kg find the total weight of the box

Answer 1

Total weight of the box = 12.89 kg

Answer 2

Answer:

given :

Outer length of the box (L) = 1.25 m = 125 cm

Outer breadth of box (B) = 0.80 m = 80 cm

Outer height of box (H) = 0.55 m = 55 cm

Thickness of the wood = 2.5 cm

Inner length of the box = 125 – 2 x 2.5 = 120 cm

Inner breadth of the box = 80 – 2 x 2.5 = 75 cm

Inner height of the box = 55 – 2 x 2.5 = 50 cm

Outer volume = l x b x h = 125 x 80 x 55 = 550000 cm

Inner volume = l x b x h = 120 x 75 x 50 = 450000 cm

Volume of wood = outer volume – inner volume = 550000 – 450000 = 100000 cubic cm

=$\frac{1}{10}$ cubic m

Weight of 1 cubic metre of wood is 250 kg

Weight of$\frac{1}{10}$ cubic metre of wood is$\frac{1}{10}$ x 250 = 25 kg