if $${secθ={a\over b},b≠0,then \ {{1-tan^2θ}\over 2-sin^2θ}  }=?$$

Directions: Following is the pie-chart showing the spending of a family on various items in a particular year

Study the pie chart and answer questions

If the total amount spent on the family during the year was ₹ 35,000, the amount spent for study of children and food together was

The average age of a husband and wife, who were married 4 years ago, was 25 years at the time of their marriage. The average age of the family consisting of husband, wife and a child, born during the interval is 20 years today. The age of the child is:

The cost price of 27 articles is the same as the selling price of 18 articles. What is the gain percentage?

From a point within an equilateral triangle, perpendiculars drawn to the three sides, are 6 cm, 7 cm and 8 cm respectively. the length of the side of the triangle is:

The marked price of an article is 40% above its cost price. If its selling price is $$73{1\over 2}\%$$ of the marked price, then the profit percentage is

if 2x² – 7x + 5 =0, then what is the value of $$x^2+{25\over 4x^2}$$

Directions: The following Pie Chart shows the export of different food grains from India in 2010. Study the chart and answer the questions:

If a total of 1.5 million quintals of crop F was exported, then the total quantity of D and E that was exported (in million quintals) was