Question

If
Tanvi
gives
an
interest
of

Rs
40
for
one


year
at
5%
rate
p.a.
What
is
the
sum
she


has
borrowed



Answer paper me hai ​

Answer 1

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Let the principle be = 'x'

Rate :- 5%

Time :- 1 year

Simple interest :- Rs. 40

Now,

Simple interest = $\frac{P×R×T}{100}$

=> 40 = $\frac{P×5×1}{100}$

=> 40 = $\frac{5P}{100}$

=> 40 × 100 = 5P

=> 4000 = 5P

=> P = $\frac{4000}{5}$

=> P = $\frac{\cancel{4000}}{\cancel{5}}$

=> P = Rs. 800