Sunny is setting up a factory to manufacture tennis balls. If she buys a machine that costs Rials32898, then she can manufacture a tennis ball for Rials1.7. On the other hand, if she buys a machine that costs Rials19500, she can manufacture a tennis ball for Rials4.6. How many tennis ball should she manufacture, so that total cost is the same no matter which machine she buys?
Due to 30% increase in the price of vegetable oil, Sasoman now has to buy 12 liter less vegetable oil to keep his total expenditure on vegetable oil unchanged. If he spends Rials6240 on vegetable oil, find the new price of vegetable oil per liters.
A garden is 50 meters wide and 120 meters long. There is a pathway that runs along the perimeter inside the garden. The area of the pathway is half of the area of the garden. What is the width of the pathway?