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686 . Divide Rs. 6000 into two parts so that simple interest on the first part for 2 years at 6% p.a. may be equal to the simple interest on the second part for 3 years at 8% p.a.
 A. Rs. 4000, Rs. 2000 B. Rs. 5000, Rs. 1000 C. Rs. 3000, Rs. 3000 D. None of these

687 . A sum of money becomes 7/4 of itself in 6 years at a certain rate of simple interest. Find the rate of interest.
 A. 12% B. 12(1/2)% C. 8% D. 14%

688 . If a certain sum of money becomes doubles at simple interest in 12 years, what would be the rate of interest per annum?
 A. 8(1/3) B. 10 C. 12 D. 14

689 . If a sum of Rs. 13040 is to be repaid in two equal installments at 3(3/4)% per annum, what is the amount of each installment?
 A. 7045 B. 8000 C. 65067 D. 6889

690 . A milkman sells cow milk at the rate of Rs. 55 litre including a profit 12 per cent. He also sells buffalo milk at the rate of Rs. 36 per litre including a profit of 20%. How much profit will he earn
 A. Rs. 632 B. Rs. 624 C. Rs. 646 D. Rs. 642

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