Answers

2016-02-21T11:09:04+05:30
Cuboid (text book)
l = 22 cm
b = 11 cm
h = 3 cm

TSA of book = 2(lb+bh+hl)
 = 2( 242+33+66)
 = 2( 341)
 = 682 cm² of the paper

As each book requires 164 cm more of the paper 
= 682 + 164 = 846 cm of the paper for each book

For 85 such books = 85*846
 = 71910 cm of the paper

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