the compound interest on a certain sum of money for 2 years at 10 % per annum is rs.420. the simple interest on the same sum at the same rate and for the same time will be-------?

rs.350

rs. 380

rs.375

rs. 400

the compound interest on a certain sum of money for 2 years at 10 % per annum is rs.420. the simple interest on the same sum at the same rate and for the same time will be-------?

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