A man borrowed Rs. 500 at simple interest at 3% per annum and Rs. 600 .at '4Y2% per annum on a condition that the total sum will be paid back when total interest amounts to Rs. 126. Find the number of years after which the sum has to be paid back?
1) 2
2) 3
3) 4
4) 5
Deven borrowed a certain amount at 6% p.a. simple interest for 9 years. After 9 years, he returned Rs. 8,470 (including principal and interest). What amount did he borrow? .
(1) Rs. 7,707.70
(2) Rs. 8,416 .
(3) Rs. 5,500
(4) Rs. 3,896
If radices of a circle is doubled in length, what would be the change, in the area of the circle 7
1) Increase 8 times
2) Increase 4 times
3) Increase 2 times
4) No change
