Pooja has enough money to buy 36 oranges at their rate of rupees 4.50 per orange . How many oranges she can buy if the price of each orange is increased by 90 paise.
A man buys oranges at Rs 5 a dozen and an equal number at Rs 4 a dozen. He sells them at Rs5.50 a dozen and makes a profit of Rs50. How many oranges does he buy?