Question

The dimensions of a closed eoddem box are 10 cm and 8 cm and 7 cm . Thickness of the wood is 1cm find the total cost of wood required to make box if cm^3 of wood costs rs 2.00 .

Answer 1

Given outer length = 10 cm Outer breadth = 8 cm Outer height = 7 cm Outer volume = length × breadth × height = 10 × 8 × 7 = 560 cm3 Thickness of wooden box, w = 1 cm Inner length = l – 2w = 10 – 2 = 8 cmInner breadth = b – 2w = 8 – 2 = 6 cmInner height = h – 2w = 7 – 2 = 5 cm Outer volume = 8 × 6 × 5 = 240 c m3 Volume of wood used = outer volume – inner volume = 560 – 240 = 320 cm3 Given cost of 1 cm3 of wood = Rs 2 Hence the total cost of wood required = Rs 2 × 320 = Rs 640

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