Quantitative Aptitude - Arithmetic Ability Questions

If 8x/3 + [7(5 - 2x/3)]/2 = 1/2 , then what is the value of x?

1/3 part of a certain journey is covered with the speed of 25 km/hr, 1/2 part of the journey is covered with the speed of 45 km/hr and the remaining part covered with the speed of 37.5 km/hr. What is the average speed (in km/hr) for the whole journey?

Wheat costing Rs 30/kg, Rs 35/kg and a third variety of wheat are mixed in the ratio of 3 : 4 : 2. If the mixture is costs Rs 34/kg, then what will be the cost (in Rs/kg) of the third variety of wheat?

A product was sold foe Rs. 4,500 at a profit of 12.5%. What was the amount of profit?

The ratio of present ages of Ramita and Satyajit is 9:7. After 9 years the ratio of their ages will be 5:4. What is Ramita's present age?

If cos4θ-sin4θ=13 then the value of tan2θ is

If 5 ­ 3x < 4 ­ x and 5(2 ­ x) > 2 ­ 2x, then x can take which of the following values?

If 3x^2 + ax + 4 is perectly divisible by x - 5, then the value of a is :