18. Find the volume of wood required for making the closed box with internal dimension 20 cm by 12.5 cm by 9.5 cm ; wood 1.25 cm thick. Share with your friends Share 2 Dheeraj answered this GVGHBJUH 0 View Full Answer Sidakpreet Singh answered this length=17.5 cm width=14 cm height=10 cm thickness=7.5 mm =0.75 cm outer volume= 17.5*14*10 = 2450 cm3 open space= (17.5-1.5)*(14-1.5)*(10-0.75) = 16*12.5*9.25 = 1850 cm3volume of wood= 2450-1850 = 600 cm3 2