Question

the simple interest on a sum of money for 5 years at 6% per annum is rupees 120 more than the interest on the same sum at 5% per annum for 4 years. find the sum invested
. answer is rs 1200​

Answer 1

Answer:

1st sum of money:

P = Rs 120

R = 6%

T = 5 years

SI = PRT/100

= 120 x 6 x 5 / 100

= 3600 / 100

= Rs 36

Amt = Rs 120 + 36 = Rs 156

2nd sum of money:

P = Rs 120

R = 5%

T = 4 years

SI = PRT/100

= 120 x 5 x 4 / 100

= 2400 / 100

= Rs 24

Amt = Rs 120 + 24 = Rs 144

Total Amt = Rs 156 + Rs 144 = Rs 300

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Answer 2

Answer:

Answer is 1200Rs

Step-by-step explanation:

Let P =Sum

According to Question

I2+120=I1

Implies P× 4×5/100 + 120 = P× 5×6/100

So 20P + 12,000 = 30P

So 10P = 12,000 , P = 1,200.

Thus ,the sum is Rs 1200