A person could save 20% of his income. A year later, his income increased by 25% but he could save the same amount only as before. By what percentage has his expenditure increased?

A is 50% more efficient than B. They together start the work and $$ {7\over 12}$$ th of work is left after 8 days. Find in what time B alone will complete the whole work.

Directions: The table given here shows the production of five types of cars by a company in the year 1989 to 1994. Study the table and answer questions.

In which year the total production of cars of types P and Q together was equal to the total production of cars of types R and S together?

If p = 101, then the value of   $$3\sqrt{p(p^2-3p+3)}$$ is

If a³ – b³ – c³ – 3abc = 0, then 

The base of a right pyramid is an equilateral triangle with side 8 cm, and its height is 30 √3 cm. The volume (in cm3) of the pyramid is:

If the angel of elevation of the sun decreases from 45⁰ to 30⁰, then the length of the shadow of a pillar increase by 60 m. The height of the pillar is

Directions : A bar graph showing the heights of six mountain peaks is given below. Study the bar graph and answer the questions. 

The average height of all the peaks (in metre) is