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 1

Given :-

• SI = Rs.40
• Rate = 5% per annum .
• Time = 1 year .

To Find :-

• Principal = P = ?

Solution :-

we know that,

• SI = (P * R * T)/100
• P = Principal
• R = Rate
• T = Time .

so, putting given values we get,

→ 40 = (P * 5 * 1) / 100

→ 40 * 100 = 5P

→ 4000 = 5P

→ P = Rs.800 (Ans.)

Hence, the sum she has borrowed was Rs.800 .

Learn more :-

CI in 2yr is Rs. 1600 and in 3 yrs it will be Rs. 1700. Find the rate of interest.

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Answer 2

Given:

If Tanvi gives an interest of Rs 40 for one year at 5% rate p.a.

To find:

what is the sum she has borrowed?

Solution:

Let the sum borrowed by Tanvi is P

Rate = 5%

Time is 1 year

Simple interest(I) = Rs 40

Finding the Principal:

I = PTR/100

=> 40 = Px1x5/100

=> 40 = 5P/100

=> 5P = 40x100

=> 5P = 4000

=> P = 4000/5

=> P = 800

Hence, the sum she has borrowed is Rs 800