Question

see the attachment

And ans the question​

Answer 1

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Rs.1=100ps.

Therefore,

Rs.18.25=Rs.18+25ps.=1800ps.+25ps.=1825ps.

Rs.20.75=Rs.20+75ps.=2000ps.+75ps.=2075ps.

Therefore,

Rs.20.75−Rs.18.25

=2075−1825

=250ps.

=200ps.+50ps.

=Rs.2+50ps.

=Rs.2.50

Answer 2

$1) \: \: 5, \: 5, \: 2$

$2) = \: \: 20.75 - 18.25$

$= 2.5$