On a trip of 200 miles, a man travels at the rate of 40 miles per hour for the first 100 miles. For the rest of the trip, he travels at the rate of 55 miles per hour . What is his average speed, in miles per hour, for the total trip ?

Three boys have marbles in the ratio of 19:5:3 . If the boy with the least number of marbles has 9 marbles, ho...

Last year I bought 1000 shares of Sunshine Enterprises at TaKa 17.25 per share. Today the stock is quoted at T...

An item is sold for $65.00, giving the retailer a profit of 30% of the cost . What will be the new retail pric...

A manufacturer finds that 0.4% of his production is defective and unsuitable for marketing . How many to 1000...

Six consecutive whole numbers are given ; the sum of the first three numbers is 27. What is the sum of the las...

The length of rectangle is increased by 20% and the width is decreased by 20% . What is the percentage increas...