The volume of a box is 1620 cm3 and its height is 20 cm. Find its base area.
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Step-by-step explanation:
(i)
Here, l = 12 cm, b = 8 cm, h = 4.5 cm
Volume of the cuboid = l×b×h
=(12×8×4.5) cm3= 432 cm3
Total Surface area = 2(lb + lh+ bh)
=2(12×8 + 12×4.5 +8×4.5) cm2=2(96 +54 + 36) cm2=2× 186 cm2=372 cm 2
Lateral surface area = 2(l+b)×h
=[2(12+8)×4.5] cm2=[2(20)×4.5] cm2=40×4.5 cm2=180 cm2
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