Quantitative Aptitude - Arithmetic Ability Questions

A gun is fired at a distance of 1.7 km from Ram and he hears the sound after 25 seconds. The speed of sound in meter per second is

If a taxi going at 40 km/hr takes 25 minutes to travel a certain distance, by how much should it increase its speed (in km/hr) to travel the same distance in 20 minutes?

The average weight of 25 candles is 40 grams. If some candles of weight 50 grams each were removed, then average weight becomes 37.5 grams. How many candles of weight 50 grams each were removed? 

A train is moving at the speed of 90 km/hr. How many seconds it will take to cover a distance of 2275 meter?

Ankit scored 32, 45 and 49 marks in Physics, English and Philosophy respectively. The maximum marks in each subject is 50. Determine his overall percentage for the three subjects.

If one root of the equation Ax2 +Bx + C = 0 is two and a half times the others, then which of the following is TRUE?

What is the simplified value of cosec Acot A + tan A2 ?

If sinA + sin2A = 1 then what is the value of cos2A + cos4A ?