Quantitative Aptitude - Arithmetic Ability Questions

If a:b = 5:8, find the value of (6a -­ 5b)/(a + 2b).

What should be the average speed of a car to cover a distance of 189 km in 3.5 hours?

A missile travels at 1116 km/h. How many metres does it travel in one second?

Flight A usually takes 1 hour more than Flight B to travel a distance of 7200 km. Due to engine trouble speed of flight B falls by a factor of 1/6th, so it takes 36 minutes more than Flight A to complete the same journey? What is the speed of Flight A (in km/hr)?

What is the fourth proportional to 72, 168 and 150?

If xy (x + y) = m, then the value of x3 + y3 + 3m is:

What will come in the place of question mark (?) in the following question (You do not have to calculate the exact value)?

24.97% of 84.01 ÷ 6.995 = ?

Ticket for an adult is Rs 1500 and a child is Rs 800. 1 child goes free with two adults. If a group has 25 adults and 12 children what is the discount the group gets?