Quantitative Aptitude - Arithmetic Ability Questions

Car B is twice as fast as car A. If car A covers 90 km in 2 hours, what is the speed of car B?

A balloon leaves from a point P rises at a uniform speed. After 6 minutes, an observer situated at a distance of 450√3 metres from point P observes that angle of elevation of the balloon is 60 deg. Assume that point of observation and point P are on the same level. What is the speed (in m/s) of the balloon?

If secA/(secA ­- 1) + secA/(secA + 1) = x, then x is

If tan2A + cot2A + 2 = x, then the value of x is

There are 10 dozen apples, 15 dozen mangoes and 20 dozen oranges for selling. If 1/2, 1/3 and 1/4 of them are sold respectively. How many of the total fruits are remaining?

When a number is increased by 34, it becomes 117% of itself. What is the number?

If A alone can do a job in 40 days then, in how many days can B alone do the job if together they can do the job in 8 days?

If a+1a=1,then the value of a2-a+1a2+a+1 is a≠0