17. Find the volume of wood required for making the closed box with internal dimensions : 20 cm by 12.5 cm by 9.5 cm; wood 1.25 cm thick. 18. Find the volume of wood required for making the open box with external dimensions 17.5 cm long, 14 cm wide, 10 cm high, wood 7.5 mm thick. Share with your friends Share 4 Nishu Kumar Govil answered this For remaining query , kindly repost it in separate thread. Regards 1 View Full Answer Shadma answered this Here ans 4 Nikita Sharma answered this L =20-1.25=18.75 B=1.25-12.5=11.25 H=1.25-9.5=8.25 V = l ? b ? h = 18.75 ? 11.25 ? 8.25 =. 1693.8281 1