Question

please answer this 4 sums I cant understand it

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Answer 1

Answer:

22. Amount for 3 years = ( principal + S.I for 3 years) = rs.837

Amount for 2 years= ( principal + S.I for 2 years) = rs.783

S.I for 1 year= rs. (837-783) = rs. 54

S.I for 2 years = rs.( 54×2)

= rs.108

we can also find S.I for 3 years and subtract it from 3 years amount

Principal = rs.(783-108)

= rs.675

so, p= rs.675 ,

rate = R %

time= 2 years

Rate% = S.I ×100/P×T

Rate% 108×100/675×2

Rate% = 8% ans.

Answer 2

22.

S.I in one year=$837-783$=$54$ (as the increase in money is S.I)

S.I in two years=$2*54$=$108$

Principal in two years=$783-108$=$675$

Principal=675

Rate=?

S.I=108

Time=2 Years

$\frac{2*r*675}{100}=108$

$\frac{1350r}{100} =108$

$1380r=10800$

$r=\frac{10800}{1380}$

$r=7.82%$

Use this method to do all other sums.

Hope it helps!