Question

Rupees 4000 amount to ₹5000 in 8 years; in what time will ₹2100 amount to ₹2800 at the same rate?

Answer 1

Interest earned in 8 years = 5000 - 4000 = 1000  

Principal = 4000  , Time = 8 years  

Formula of Simple interest is as follows  

S.I = (Principal × Rate × time)/100  

⇒ 1000 = ( 4000 × Rate × 8 ) /100  

⇒ Rate = (1000 × 100)/(4000 × 8) = 3.125%  

in second case Required Simple interest = 2800 - 2100 = 700  

⇒ 700  = (2100 × 3.125 × Time ) / 100     [ using formula of S.I and calculated Rate]  

⇒ 70000/(2100 × 3.125) = Time  

Time = 10.667 years

So 10.667 years will be required for Rs 2100 to increase to Rs 2800 at Rate of 3.125%.

Answer 2

Step-by-step explanation:

10 years 8 months is the answer of that question