Quantitative Aptitude - Arithmetic Ability Questions

A train crosses a 550 m long platform in 36 seconds. How long was the train if it was travelling at the speed of 70 kmph?

A train starts moving from a place P at 10:00 a.m. and arrives at another place Q at 5:30 p.m. on the same day. If the speed of the train is 50 km/hr, then what will be the distance (in km) covered by the train?

A train travelling at 76 kmph crosses a 450 m long platform in 27 seconds. What is the length of the train?

What is the value of ( 1/2 - cot45) ?

In a triangle PQR, ∠Q = 90°. If PQ = 12 cm and QR = 5 cm, then what is the radius (in cm) of the circum circle of the triangle?

If x + y = 3, then what is the value of x3 + y3 + 9xy?

The sum of 2xy(3x + 4y - 5z) and 5yz(2x - 3y) is

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