The simple interest on a certain sum of money for 21/2 yr at 12% per annum is 20 less than the simple interest on the same sum for 31/2 yr at 10% per annum. Find the sum.

The simple interest on a certain sum of money for 21/2 yr at 12% per a

1.	The simple interest on a certain sum of money for 2¹/₂ yr at 12% per annum is 20 less than the simple interest on the same sum for 3¹/₂ yr at 10% per annum. Find the sum.
A.	800
B.	750
C.	625
D.	400
E.	None of the above
Answer» E. None of the above

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The simple interest on a certain sum of money for 21/2 yr at 12% per annum is 20 less than the simple interest on the same sum for 31/2 yr at 10% per annum. Find the sum.

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The simple interest on a certain sum of money for 2¹/₂ yr at 12% per annum is 20 less than the simple interest on the same sum for 3¹/₂ yr at 10% per annum. Find the sum.