How much cardboard is needed to make a rectangular box of length 12 cm breadth 10cm and height 7cm?
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2 (12×10+10×7+12×7)=274cm2
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lateral surface area=2h(l+w)
2*7*(12+10)
14*22
308cm square of cardboard
2*7*(12+10)
14*22
308cm square of cardboard
geethadhsg:
840 sq.cms of cardboard
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