Kunal purchased a cubboard having a price tag of Rs. 2400 for Rs. 2000 and sold it with 40% profit. At what price did he sell it?

1)  Rs. 2800

2)  Rs. 3360

3)  Rs. 2960

4)  Rs. 3200

25 men with 10 boys can do in 6 days as much work as 21 men with 30 boys can do in 5 days. How many boys must help 40 men to do the same work in 4 days?

1)  5 boys

2)  40 boys

3)  20 boys

4)  10 boys.