Quantitative an...

How many bricks measuring 25cm × 11cm × 7cm will be needed to build a wall 55m × 14m × 10m?

If 1/x + 1/y = 1/7 and 2/x + 3/y = 1/6, then find x.

In a city, the average rainfall for the first 5 months of a year is 5 inches and the average rainfall for the last 5 months of that year is 8 inches. Find the average rainfall of that year if the total rainfall for the months of June and July is 7 inches.

A plant manager wishing to draw up his 7950 workers in the form of a solid square found that he had 29 workers left over. Find the number of men in the front row?

A mixture contains milk and water in the ratio 5 : 3. On adding 2 litres of water to it, the ratio of milk to water becomes 4 : 3. What is the quantity of the milk in the mixture?

P takes twice the time taken by Q to complete a piece of work, alone. R takes twice the time taken by P to complete the same piece of work. P takes 5 days to complete the work. How much time will they take to finish the work if they work together?

In their respective businesses, 10% of A’s profit is equal to 20% of B’s profit. What is the ratio of their respective turnovers?

By how much is four-seventh of 420 greater than two-fifth of 280?