if x+y =3 and $${1\over x}+{1\over y}= -{3\over 10}$$ then the value of (x²+y²) is :

In a triangle, if three altitudes are equal, then the triangle is 

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

Find the ratio between the fourth proportional of 12, 16, 6 and the third proportional of 4, 6.

Length of a rectangle is 53 metre, while its breath is 28 metre. Cost of covering it with grass bed is Rs.27 sq meter. Find total expenditure?

How many metres of 2-m-wide cloth will be required to make a conical tent with the diameter of the base as 14 m and slant height as 9 m ignore wastage?

If $$cosθ + cos^2θ= 1,$$find the value of $$\sqrt {sin^4θ+cos^2θ} \ $$

A can do a work in 15 days and B in 9 days. If they work on it together for 5 days, then what fraction of work is left?