Quantitative Aptitude - Arithmetic Ability Questions

Factors of 36 - 

A man covered a certain distance by a train running at the speed of 50 km/hr and covers the same distance back by walking at the speed of 5 km/hr. Ifthe whole journey took 5 hours 30 minutes, then what was the distance (in km) of one side?

A can complete a work in 20 days and B can complete the same work in 25 days. If both of them work together, then in 3 days what percent of the total work will be completed?

If sec2θ+tan2θ=3, then sec4θ-tan4θ =

ax + 3y = 6 has slope -2/3. What is the value of a?

A bank offers 20% compound interest per half year. A customer deposits Rs 6000 each on 1st January and 1st July of a year. At the end of the year, the amount he would have gained by way of interest is

What is the area (in sq cm) of a rectangle if its diagonal is 25 cm and one of its sides is 24 cm?

If the side of a square is increased by 20%, then what will be the percentage increase in its perimeter?