Question

Rajni invested ₹15000 at simple interest for 2 years at the rate of R% and gets an interest of ₹2100.He invested total amount (Principal+Interest) in a scheme.which offered compound interest at the rate of (R%+x%) for two years.→What are the possible integral values of 'x%' so that obtained compound interest is less than ₹3000.
(i)1%(ii) 2% (iii) 3%(iv) 4% (v) 5%
(A) Only (i) (B) Only (i), (ii)
(C) Only (i), (ii) &(iii)
(D) Only (i) , (ii), (iii) &(iv)
(E) All of the above

PLEASE EXPLAIN IF YOU ANSWER​

Answer 1

Answer:

1

Step-by-step explanation:

first we find r by using i = ptr/100 here, r =7% p.a again we find total simple amount = 15000 + 2100 = 17100 it is p for compound amount here compound amount <= 20100

rate = 7 + x % by using ca formula we find x