An item is sold at two successive gains of 30% and 20%. If the final selling price is Rs 31200, then what is the cost price (in Rs)?

In a certain year, the average monthly income of a person was Rs.3,400. For the first eight months of the years, his average monthly income was Rs. 3,160 and for the last five months, it was Rs.4,120. His income in the eighth month of the year was: 

A number x when divided by 289 leaves 18 as the remainder. The same number when divided by 17 leaves y as a remainder. The value of y is 

At the angle the hands of a clock are inclined at 15 minutes past 5?

What is the total surface area and curved surface area of a solid semi circle with radius of 14 cm?

Gold is 19 times as heavy as water and copper is 9 times as heavy as water. In what ratio should these metals be mixed so that the mixture may be 15 times as heavy as water?

The bar graph given below shows the production of sugar (in lakh tonnes) by two different companies P and Q for the given years.

J1 = percentage increase in production of sugar of company P from 1991 to 1995.

J2 = percentage increase in production of sugar of company Q from 1992 to 1994.

What is the value of J1 + J2?

The distance between two pillars is 120 meters. The height of one pillar is thrice of the other pillar. The angles of elevation of their tops from the midpoint of the line connecting their feet are complementary to each other. The height (in metres) of the pillar is (use : √3 = 1.732 )