Quantitative Aptitude - Arithmetic Ability Questions

A 600 metres long train is running at the speed of 81 km/hr. If it crosses a platform in 40 seconds, then what is the length of the platform (in metres)?

The radius of a cylindrical milk container is half its height and surface area of the inner part is 616 sq.cm. The amount of milk that the container can hold, approximately, is [ Use : √5 = 2.23 and π = 22/7 ]

The diameter of a circle is equal to the side of the square. What is the area of the square if the area of the circle is 49π sq cm?

The average of ten numbers is 18. If one number is removed, then the average becomes 16, then what is the removed number?

P, Q and R are channels which discharge solutions A,B and C respectively in a tank. When the tank is empty and all the three channels are opened what is the proportion of the solution C in the tank after 3 minutes, if the channels P, Q and R can fill the tank from empty to full in 30 minutes and 20 minutes and 10 minutes respectively when they are opened one at a time.

sin(A+B) -­ sin(A-­B) is equal to

In a triangle ABC, the length of in-radius and circum-radius is 2 units and 6 units respectively. Find the distance (in units) between the in-centre and circum-centre.

Select the odd word/letters/number/number pair from the given alternatives.