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900 cm^
formula of area of cuboid= 2(l+b)h cm^2
= 2(20+10)15 cm^2
=900 cm ^2
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Step-by-step explanation:
9)given dimensions of cuboid are 20*10*15 cm
area of cuboid to white wash=lateral surface area of cuboid=2h(l+b)
=2(15)(10+20)=30*30=900
10) given volume of cube=64cm^3
so side of cube=64^(1/3)=4cm
total surface area of cube=6(a^2)=6(4^2)=6*16=96(cm^2)
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