6. The outer dimensions of a closed wooden box are10cm by 8cm.by 7cm. Thicknessuisetelevlevesser(4.05cm1cm. Find the total cost of required to make box if iem of wood cost Rs 2.Rs 640)

6. The outer dimensions of a closed wooden box are10cm by 8cm.by 7cm.

1.	6. The outer dimensions of a closed wooden box are10cm by 8cm.by 7cm. Thicknessuisetelevlevesser(4.05cm1cm. Find the total cost of required to make box if iem of wood cost Rs 2.Rs 640)
Answer» Given outer length = 10 cmOuter breadth = 8 cmOuter height = 7 cmOuter volume = length × breadth × height= 10 × 8 × 7 = 560 cm3Thickness of wooden box, w = 1 cmInner length =l– 2w = 10 – 2 = 8 cmInner breadth =b– 2w = 8 – 2 = 6 cmInner height =h– 2w = 7 – 2 = 5 cmOuter volume = 8 × 6 × 5 = 240 c m3Volume of wood used = outer volume – inner volume= 560 – 240 = 320 cm3Given cost of 1 cm3of wood = Rs 2Hence the total cost of wood required = Rs 2 × 32= Rs 640