6. A sum of ₹ 18000 amounts to ₹ 21600 in 4 years at the rate of simple interest. What is the rate of interest ?
3%
5%
4%
6%
7. X is 4 years older to Y and 4 years younger to Z, while Y and P are twins. How many years older is Z to P ?
2
8
6
12
8. A can finish a work in18 days and B can do the same work in 15 days. B worked for 10 days and left the job. In how many days, A alone can finish the remaining work?
5
5.5
9. If Rahul walks at 18 km/hr instead of 12 km/hr, he would have walked 22 km more. The actual distance travelled by him is:
44 km
50 km
40 km
56 km
10. The compound interest on ₹ 30000 at 7% per annum is ₹ 4347. The period (in years) is:
3
2.5
4