Diagonals of trapezium PQRS intersect each other at the point O, PQ||RS, and PQ = 3RS. Find the ratio of the areas of triangles POQ and ROS.

The ratio of 11th term to 18th term of an AP is 2:3. Find the ratio of 5th term to the 21st term, also the ratio of the sum of the first 5 terms to the sum of the first 21 terms.

In a year, Seema earns ₹ 1,50,000 and saves ₹ 50,000. Find the ratio of (b) Money that she saves to the money she spends.

In a year, Seema earns ₹ 1,50,000 and saves ₹ 50,000. Find the ratio of (a) Money that Seema earns to the money she saves.

Masses of three wires of copper are in the ratio of 1 :3 : 5 and their lengths are in the ratio of 5 : 3 : 1 . The ratio of their electrical resistance is

Find the ratio of the following: (a) Speed of a cycle 15 Km per hour to the speed of scooter 30 Km per hour. (b)50 m to 10Km. (c)50 paise to Rs.5

The circumference of two circles is in the ratio 2:5 , Find the ratio of their areas.

The area of a circular playground is 22176 m^2 . Find the cost of fencing this ground at the rate of Rs 50 per metre.