Q7 of 64 Page 77

Find the area of card board required to make an open cubical box of side 40 cm. Also find the volume of the box.

Given:

side of cube (a) = 40cm


Area of open cubical box = 5a2


= 5(40)2


⇒ area of cube = 8000cm2


Volume of cube = a3


= (40)3


⇒ Volume of cube = 64000cm3


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