railway RRB JE (CBT I + CBT II) Mock Test 2024 Quantitative Aptitude Interest Simple Interest

If a sum of money becomes 4000 in 2 yrs and 5500 in 4 yrs 6 months at the same rate of simple interest per annum. Then the rate of simple interest is

1
\(21\frac{3}{7}\% \)
2
\(21\frac{2}{7}\% \)
3
\(21\frac{1}{7}\% \)
4
\(21\frac{5}{7}\% \)
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