Quantitative Aptitude - Arithmetic Ability Questions

The area of a rectangle is 120 sq cm and its perimeter 140 cm. What is the length of its diagonal?

If the shopkeeper sells an item at Rs 960 which is marked as Rs 1200, then what is the discount he is offering?

At what rate of compound interest (in %) per annum will a sum of Rs. 15,000 become Rs. 18,150 in 2 years?

If the successive discounts be 20% , 10% and 5% , then the single equivalent rate of discount is

If 9x+2 = 240 + 9x, the value of (8x)x is

If a3- b3= 91 and a - b = 1, then what is the value of ab?

If the value of 3-1.732, then calculate the value of 243-12108-147

Two pipes X and Y can fill an empty tank in 16 hours and 20 hours respectively. Pipe Z alone can empty the completely filled tank in 25 hours. Firstly both pipes X and Y are opened and after 6 hours pipe Z is also opened. What will be the total time (in hours) taken to completely fill the tank?