For the following questions answer them individually
If a : b : : b : c, and b = 96, then which of the following can be a possible pair of values of a and c?
A thief is chased by a policeman and distance between them is 3 km. The speed of policeman is 75 km/h and the speed of the thief is 60 km/h. The policeman will be able to catch the thief when the thief would have covered the distance of _________ km.
The average weight of 15 persons is increased by 1.2 kg when one of them whose weight is 51 kg is replaced by a new man. The weight of the new man is:
If $$\left(5y + \frac{5}{y}\right) = 11$$, find the value of $$\left(y^2 + \frac{1}{y^2}\right)$$.