Quantitative Aptitude - Arithmetic Ability Questions

If 20 men working 8 hours per day can complete a piece of work in 21 days. How many hours per day must 48 men work to complete the same job in 7 days?

Mahmood can do a piece of work in 40 hours. If he is joined by Janaki who is 50% more efficient, in what time will they together finish the work?

ABC is a right angled triangle in which ∠A = 90°, AB = 5 cm and AC = 12 cm. What is the approximate volume (in cm3) of the double cone formed by rotating the triangle about its hypotenuse?

What is the value of Tan 45° - 1/√3 Sec 60°?

If 1aa2+1 = 3, then the value of a6+1a3 is

At what percentage above the cost price must an article be marked so as to gain 33% after allowing a customer a discount of 5%?

Find the area (in cm2) of a semi-circle of radius 28 cm.

If the price of sugar is decreased by 18%, then a person can buy 16.2 kg sugar more for Rs 4500. What will be the new price (in Rs) of sugar per kg?