16. Find the surface area of a cuboidal box whose length, breadth and height are 20 cm, 15 cm and 5 cm
peetively. Find its lateral surface area also.
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Step-by-step explanation:
TOTAL SURFACE AREA = 2(lb+bh+hl)
= 2(20*15+15*5+5*20)
= 2(300+75+100)
= 2(475)
= 2*475
= 950cm sq.unit
lateral surace area= 2(l+b)*h
=2(20+15)*5
=2(35)*5
=70*5
=350cm sq.unit
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