Quantitative Aptitude - Arithmetic Ability Questions

On walking 100 metres towards a building in a horizontal line, the angle of elevation of its top changes from 45 to 60 deg. What will be the height (in metres) of the building?

What is the slope of the line, parallel to the line 3x -­ 6y = 4?

If (6x ­- 1) -­ (8x -­ 5) = 7, then the value of x is _______ .

If the value of √30  is approximately 5.477, then what is the approximate value of 56 ?

What is the average of 36, 43, 51, 68, and 77?

Among three numbers, the first is twice the second and thrice the third. If the average of three numbers is 198, then what is the difference between the first and the third number?

The time for a train of length 110 metres running at the speed of 72 km/hr to cross a bridge of length 132 metres is

Sachin lent out Rs 60000 in two parts, first at 4% and the second at 10% interest. The yearly average interest comes out to be 6.4%. What are the amounts (in Rs) that were lent at 4% and 10% respectively?