Quantitative Aptitude - Arithmetic Ability Questions

If x+1x = 2, then x2+1x2 = ?

How long does a train, 75 m long, moving at 60 km/hr take to pass a certain telegraph post?

The time taken by a train 160 m long, running at 72 km/hr, in crossing an electric pole is

20 kg of a mixture of wheat and husk contains 5% husk. How many kg more of husk must be added to make the husk content 20% in the new mixture?

In a class of 50 students there are 27 boys. The average weight of these boys is 72 Kg and average weight of the full class is 55.44 kgs. What is the average weight (in kgs) of the girls of the class?

Sita's bucket has thrice the capacity as Ramu's bucket. It takes 60 turns for Sita's bucket to fill the empty drum. How many turns it will take for both the buckets of Sita's and Ramu's, having each turn together to fill the empty drum?

If two successive discounts of 50% and 10% are offered, then what is the net discount (in %)?

The ratio of the volume of two cylinders is 7 : 3 and the ratio of their heights is 7 : 9. If the area of the base of the second cylinder is 154 sq. cm, then what will be the radius (in cm) of the first cylinder?