Question

A closed wooden box of 80cm length,65cm width and 45cm height is made up of 2.5cm thick wood.Find the capacity of the box and its weight.If 100cm3 of wood weighs 8g.

Answer 1

outer length of box = 80 cm outer width of box = 65 cm outer height of the box = 45 cm Since thickness of wood is 2.5cminner length of box = 80 -2 x 2.5 = 75 cm inner width of box = 65 - 5 = 60 cm inner height of box = 45 - 5 = 40 cm Capacity of the box = 75x60x40 = 180,000 cm^3Volume of wooden part = 80 x 65 x 45 - 75 x 60 x 40 = 54,000 cm^3Weight of 100 cm^3 of wood = 8gweight of 54,000 cm^3 of wood will be 8/100 x 54,000 = 4320g