Question

Three questions 19,20,21

Solve this question on paper

Answer 1

sorry, i know only the answer of 20th question.

A suitcase is in the shape of a cuboid

So, surface area of a cuboid=2(lb+bh+lh),where l=length, b=breadth, h=height of the cuboid

Let the length, breadth and height of the suitcase be l , b, h respectively

Here, l=80cm , b=40cm , h=24cm

Therefore, area=2(80*40+40*24+80*24)cm²

=2(3200+960+1920)cm²

=2*6080cm²

=12160cm²

Hence, surface area of 100 suitcases= 12160cm²*100

=1216000cm²

Also, surface area of the tarpaulin will also be the same

Therefore,required length of tarpaulin

=surface area÷width

=1216000cm²÷96cm

=12667cm (approx)

=12.67 m

Answer 2

Ans.19 Euler's Formula=F+V=E+2