Arithmetic Questions And Answers :: True Discount: part2

6.A man purchased a cow for Rs. 300 and sold it the same day for Rs. 360, allowing the buyer a credit of 9 years. If the rate of interest be 7 % per annum, then the man has a gain of:

7.The true discount on Rs. 1860 due after a certain time at 5% is Rs. 60. The time after which it is due is:

8.If Rs. 10 be allowed as true discount on a bill of Rs. 110 due at the end of a certain time, then the discount allowed on the same sum due at the end of double the time is:

9.The simple interest and the true discount on a certain sum for a given time and at a given rate are Rs. 25 and Rs. 20 respectively. The sum is:

10.A has to pay Rs. 220 to B after 1 year, B asks A to pay Rs. 110 in cash and defer the payment of Rs. 110 for 2 years. A agrees to it. Counting, the rate of interest at 10% per annum in this new mode of payment: