The ratio of investment by A to that by B in a business is 14 : 15 and the ratio of their respective profit at the end of a year is 2 : 5. If A invested the money for 3 months, then for how much time ( in months) B invested his money?

If radius of a sphere is decreased by 48%, then by what percent does its surface area decrease?

A train covers 400 m distance in 24 sec. Its speed is-

A property fetches a net annual income of ₹1000 deducting all outgoings. The capitalized value of the property for the rate of interest 6% will be (in ₹) -

A trader allows a trade of 20% and a cash discount of $$6{1\over 4}\%$$% on the marked price of the goods and gets a net gain of 20% of the cost. By how much above the cost should the goods be marked for the sale? 

The following table shows the number of units of product produced and sold by a company during six years.

What is the difference between the number of units produced in 2017 and the number of units sold in 2014? 

The average age of a man and his son is 55 years. The ratio of their ages is 7 : 4, respectively. What will be the ratio of their ages after 6 years?

What is the area of the largest triangle that can be fitted into a rectangle of length 'l' units and width 'w' units?