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At what rate of simple interest per annu...

At what rate of simple interest per annum, does the interest on Rs. 1200 in 2 years equals the interest on Rs. 600 at 4 years at `(7)/(2)%` per annum ?

A

`3/(4)%`

B

`7/(2)%`

C

`4/(3)%`

D

`7/(8)%`

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The correct Answer is:
B
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