Quantitative Aptitude - Arithmetic Ability Questions

If (4/5)A = 3B = (2/3)C, then what is A : B : C?

Speeds of a boat along the current and against the current are 14 km/hr and 7 km/hr respectively. What is the speed of boat (in km/hr) in still water?

If 170% of a number added to 66, then the result becomes equal to twice of the number. What is the number?

The reciprocal of the sum of the reciprocals of 2/9 and 7/10 is

A number is greater than thrice its reciprocal by 26/3. What is the number?

If {12(a-b)}2+ab=p(a+b)2, then the value of p is 

A invested an amount of x rupees in a bank for 2 years which gave 5% interest in year 1 and 6% interest in year 2. The amount received after 2 years is Rs 24,486. What is the value of x?

To cover a distance of 90 km in 2.5 hours what should be the average speed of the car in meters/second?