Question

(c) The volume, total surface area and length of a diagonal of a cuboid are V, S and d respectively.
If all the edges are doubled, they become V', S' and d' respectively. Find V':V,S': S and d': d.
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Answer 1

Step-by-step explanation:

V=lbh,S=2(lb+bh+lh),d=l2+b2+h2

V′=(2l)(2b)(2h)=8lbh

S′=2((2l)(2b)+(2b)(2h)+(2l)(2h))

    =4×2(lb+bh+lh)

d′=(2l)2+(2b)2+(2h)2

    =4(l2+b2+h2)=2l2+b2+h2

VV′=8;SS′=4;dd′=2

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Answer 2

Answer:

Refer to the given attachment

Step-by-step explanation:

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