Alex sold his goods after announcing two successive discounts of 30% each. The effective discount altogether is-

A pipe can empty a tank in 40 minutes. A second pipe with diameter twice as much as that of the first is also attached with the tank to empty it . The two pipe together can empty the tank in: 

1008 divided by which single-digit number gives a perfect square?

QA and PB are perpendicular to AB in the given figure. If AO = 10 cm, BO = 6cm, BP = 9 cm, then the length of AQ is__

A wholesaler sold a water purifier at a loss of 40%. If the selling price has been increased by Its. 125, then wholesaler will get the profit of 10%. What was the cost price of the purifier?

A coconut tree swings with the wind in such a manner that the angle covered by its trunk is 18 degrees. If the topmost portion of the tree covers a distance of 44 metres, find the length of the tree.

Of the three numbers, the ratio of the first and the second is 8 : 9 and that of the second and third is 3 : 4. If the product of the first and third number is 2400. then the second number is: 

The total surface area of a cube is 864 square cm. What is his volume?