11) A sum of ₹20000 accumulated to ₹ 50000 , after 12 years. Find the rate of simple interest p.a., which was effective in this situation.

Correct Answer - ` 11: 3`

Correct Answer - `I=(PTR)/(100)`

Correct Answer - Rs 11800

Correct Answer - `a=(10)/(19)m//s^(2)`

5 years after age of each of father and his two sons will be 10 years more than  it was 5years ago. Hence after 5years the sum of thieir age...

Correct Answer - 0.0025

Correct option is (D) none Let Ramu's present age be x years. \(\therefore\) Ramu's age before 4 years = (x - 4) years Ramu's age after 12 years = (x + 12) years \(\therefore\) x+12 = 3(x-4) \(\Rightarrow\) x+12...

A) Only (i) is true

Correct option is  D) ₹ 7,100

Correct option is (A) 8 Let the amount taken be Rs P. \(\therefore\) S.I. = \(\frac{16}{25}\times\) P = \(\frac{16P}{25}\) R = T \(\therefore\) S.I. = \(\frac{PRT}{100}\) \(\Rightarrow\) \(\frac{16P}{25}\) = \(\frac{P\times R\times R}{100}\)  \((\because\)  R = T) \(\Rightarrow\) \(R^2=\) \(\frac{16P}{25}\times\frac{100}P\) \(=16\times4=64=8^2\) \(\Rightarrow\) R = 8 \(\Rightarrow\) T = R = 8