Question

If 1680 be simple interest on a sum of 8,000 for 7 years, then the rate
of simple interest is (a) 4%, (b) 5%, (c) 6%, (d) None of these.​

Answer 1

If it is approximation then the answer will be (a) but if it is not approximation then the answer will be (d) that is none of these the actual answer is 3.79 percent.