Quantitative Aptitude - Arithmetic Ability Questions

A man starts moving from a place A and reaches the place B in 26 hours. He covers 1/3rd of the distance at the speed of 4 km/hr and covers the remaining distance at the speed of 5 km/hr. What is the distance (in km) between A and B?

50 litre mixture of water and alcohol contains 10% alcohol. How much more alcohol must be added to make the strength of alcohol 40% in the new mixture?

An 80 litre mixture of water and acid contains 20% acid. How much acid should be added to make the acid 60% in the new mixture?

What will be the value of r2+p2+s2-rp-ps-rs when r = 4, p = 2, s = 8?

What is the length of the side of an equilateral triangle, if its area is 36√3 sq cm?

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

ΔDEF is right angled at E. If cosD = 8/17, then what is the value of secF ?

Find the radius of the circle if the length of its arc is 33 cm whose corresponding central angle is 90° ?