a box of about 7 cm high 10 cm wide and 20 cm long is made of cardboard which is open from top . find the area of cardboard needed to make box
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Answered by
1
2 (lb+bh+hl)
l = 20cm
b = 10cm
h = 7 cm
l = 20cm
b = 10cm
h = 7 cm
Answered by
6
Height of box= 7cm
Width of box=10cm
Length of box=20cm
Area of cardboard needed= Lateral Surface Area of cuboid - area of top of box
=2 (l+b)h-(l×b)
=2 (7+20)10 -(20×7)
=2×27×10-140
=540-140
=400 square cm
Hope it will help you
Width of box=10cm
Length of box=20cm
Area of cardboard needed= Lateral Surface Area of cuboid - area of top of box
=2 (l+b)h-(l×b)
=2 (7+20)10 -(20×7)
=2×27×10-140
=540-140
=400 square cm
Hope it will help you
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