(i) □ABCD is a parallelogram. The ratio of ∠A and ∠B of this parallelogram is 5 : 4. Find the measure of ∠B.(ii) The ratio of present ages of Albert and Salim is 5 : 9. Five years hence ratio of their ages will be 3 : 5. Find their present ages.(iii) The ratio of length and breadth of a rectangle is 3 : 1, and its perimeter is 36 cm. Find the length and breadth of the rectangle.(iv) The ratio of two numbers is 31 : 23 and their sum is 216. Find these numbers.(v) If the product of two numbers is 360 and their ratio is 10 : 9, then find the numbers.

(i) □ABCD is a parallelogram. The ratio of ∠A and ∠B of this

1.	(i) □ABCD is a parallelogram. The ratio of ∠A and ∠B of this parallelogram is 5 : 4. Find the measure of ∠B.(ii) The ratio of present ages of Albert and Salim is 5 : 9. Five years hence ratio of their ages will be 3 : 5. Find their present ages.(iii) The ratio of length and breadth of a rectangle is 3 : 1, and its perimeter is 36 cm. Find the length and breadth of the rectangle.(iv) The ratio of two numbers is 31 : 23 and their sum is 216. Find these numbers.(v) If the product of two numbers is 360 and their ratio is 10 : 9, then find the numbers.
Answer» (i) $□$ ABCD is a parallelogram. The ratio of $∠$ A and $∠$ B of this parallelogram is 5 : 4. Find the measure of $∠$ B. (ii) The ratio of present ages of Albert and Salim is 5 : 9. Five years hence ratio of their ages will be 3 : 5. Find their present ages. (iii) The ratio of length and breadth of a rectangle is 3 : 1, and its perimeter is 36 cm. Find the length and breadth of the rectangle. (iv) The ratio of two numbers is 31 : 23 and their sum is 216. Find these numbers. (v) If the product of two numbers is 360 and their ratio is 10 : 9, then find the numbers.