Question

A closed wooden box 80cm,long 65cm wide and 45cm high is made of 2.5cm thick wooden .find the capicity of box and its weight if100cmcube of wooden weight 8gram

Answer 1

external volume= 80*65*45=234000 cubic centimeter
 
internal length = 80- (2.5*2)=75
internal breadth= 65- (2.5*2)=60
internal height = 45-(2.5*2)=40
internal volume = 75*60*40= 180000 cubic centimeter
 
capacity = internal volume

volume of the wood = external volume - internal volume
                            = 234000 - 180000
                            = 54000
now, given, 100cm3 of wood= 8g
                = 54000* 1/100
                = 540*8
                = 4320g
                =  4.320kg