Question

The sum of twonumbers which are in the ratio of 2:5 is 21. What is the number ​

Answer 1

Explanation:

let it be 2x ,5x

sum = 21

2x+5x=21

7x = 21

x= 21/7

3

x=3

2x= 2into3=6

5x= 5 into 3= 15

Answer 2

Answer:

x = 6 , y = 15

Explanation:

x = 2a

y = 5a

2a + 5a = 21

7a = 21

a = 21/7

a = 3

Therefore

x = 2 × 3

= 6

and,

y = 5 × 3

= 15