Question

A closed wooden box 80cm long,65cm wide and 45cm high,is made 2.5cm thick
wood.

Findthecapacityoftheboxanditsweightif100cm

3ofwoodweighs8g​

Answer 1

Answer:

outer length of box = 80com

outer width of box = 65cm

outer height of the box = 45cm

Since , thickness wood is = 2.5cm

inner length of box = 80 - 2 × 2.5 = 75cm

inner width of box = 65 - 5 = 60cm

inner height of box = 45 - 5 = 40cm

Capacity of the box = 75 × 60 × 40 = 180,000 cm^³

Volume of wooden part = 80 × 65 × 45 - 75 × 60 × 45 = 54,000 cm^³

Weight of 100 cm^³ of wood =8g

weight of 54,000 cm^³ of wood will be 8/100 × 54,000 = 4320g