A sum becomes Rs 15,500 in 7 years on simple interest at the rate of 30 percent per annum. What is the total interest for the 7 years ?

Rs. 12,200 Rs. 1,47,000 Rs. 10,500 Rs. 11,500

Rs. 10,500

Amount(A) = 15500 Let Principle (P) = 100 Then total interest (I) = Rate(R) × Time (T)                                 = 30 × 7 = 210 ⇒ A = P + I ⇒ A = 100 + 210 = 310 ATQ ⇒ 310 unit = 15500 ⇒ 1 uint = 50 ⇒ Interest = 210 unit = 210 × 50 = Rs 10500