A wooden box is 140 cm long, 100 cm wide, and 80 cm high. If the wood is 5 cm thick on all sides of the box, find the volume of wood used to make the box.
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Answer:
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l
l ′
l ′ =80−2(2.5)=75cm
l ′ =80−2(2.5)=75cmb
l ′ =80−2(2.5)=75cmb ′
l ′ =80−2(2.5)=75cmb ′ =60cm
l ′ =80−2(2.5)=75cmb ′ =60cmh
l ′ =80−2(2.5)=75cmb ′ =60cmh ′
l ′ =80−2(2.5)=75cmb ′ =60cmh ′ =40cm
l ′ =80−2(2.5)=75cmb ′ =60cmh ′ =40cm[Dimensions of inside of box]
l ′ =80−2(2.5)=75cmb ′ =60cmh ′ =40cm[Dimensions of inside of box]v=l
l ′ =80−2(2.5)=75cmb ′ =60cmh ′ =40cm[Dimensions of inside of box]v=l ′
l ′ =80−2(2.5)=75cmb ′ =60cmh ′ =40cm[Dimensions of inside of box]v=l ′ b
l ′ =80−2(2.5)=75cmb ′ =60cmh ′ =40cm[Dimensions of inside of box]v=l ′ b ′
l ′ =80−2(2.5)=75cmb ′ =60cmh ′ =40cm[Dimensions of inside of box]v=l ′ b ′ h
l ′ =80−2(2.5)=75cmb ′ =60cmh ′ =40cm[Dimensions of inside of box]v=l ′ b ′ h ′
l ′ =80−2(2.5)=75cmb ′ =60cmh ′ =40cm[Dimensions of inside of box]v=l ′ b ′ h ′ =(75)(60)(40)
l ′ =80−2(2.5)=75cmb ′ =60cmh ′ =40cm[Dimensions of inside of box]v=l ′ b ′ h ′ =(75)(60)(40)=180000cm
l ′ =80−2(2.5)=75cmb ′ =60cmh ′ =
l ′ =80−2(2.5)=75cmb ′ =60cmh ′ =40cm[Dimensions of inside of box]v=l ′ b ′ h ′ =(75)(60)(40)=180000cm 3 100cm 3 →8g180000cm 3 → 1008 ×180000=14400gWeight=14.4 kg.