Question

rate of interest =10 time period =2 years compound interest =210 principal =?​

Answer 1

Answer:

1000

Step-by-step explanation:

Given details are,

Rate = 10 % per annum

Compound Interest (CI) = Rs 210

Time (t) = 2 years

By using the formula,

Let P be ‘x’

CI = A – P

210 = P (1 + R/100) n – P

= P [(1 + R/100)n – 1]

= x [(1 + 10/100)2 – 1]

= x [(110/100)2 – 1]

210 = x ((1.1)2 – 1)

x = 210 / ((1.1)2 – 1)

= 210/0.21

= Rs 1000

∴ The required sum is Rs 1000

Answer 2

Answer:

R%= 10%

n=2yrs

CI =210

CI = P(  1 + r/100 )^n

P =   CI /  ( 1 + r/100 )^n

P =   210 / ( 1 + 1/10 )^2

P = 210 / 1.21

P = 173.553

P= Rs.173.55( approx.)