## 1. 3 pumps, working 8 hours a day, can empty a tank in 2 days. How many hours a day must 4 pumps work to empty the tank in 1 day?

## 2. If the cost of *x* metres of wire is d rupees, then what is the cost of *y* metres of wire at the same rate?

*x*metres of wire is d rupees, then what is the cost of

*y*metres of wire at the same rate?