Rs.600 amounts to Rs.900 in 3 years at simple interest. If the interest is increased by 4%, it would amount to how much?  Select.
A) 672  B) 246  C) 258  D) 856  E) 653

Rationale: "( 600 * 3 * 4 ) / 100 = 72 600 + 72 = 672 answer : a"
Answer: A