A closed box of dimensions 40 cm x 20 cm x 5 cm is made from a sheet of metal. How much sheet of metal is required
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Step-by-step explanation:
From the given dimensions,it is clear that the closed box is a cuboid whose,
length(l)=40cm
breadth(b)=20cm
height(h)=5cm
T.S.A. of cuboid = area of metal sheet required =
2(l×b+b×h+h×l)= 2(40×20+20×5+5×40) = 2(800+100+200) = 2×1100 = 2200cm^2 ans.
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