The ratio of two numbers is 5:6. If a number is added to both the numbers the ratio becomes 7:8. If the larger number exceeds the smaller number by 10. Find the number added.  Choose the correct choice from the following answers:
A) 30
B) 10
C) 20
D) 40
E) Cannot be determined
let the numbers are 5x and 6x. Let the number added is y so 5x+y/6x+y = 7/8   and 6x-5x = 10 implies x = 10   taking x=10, 50+y/60+y = 7/8 implies 400+8y = 420+7y or y = 20   ANSWER:20
<result>C</result>
The ratio of two numbers is 5:6. If a number is added to both the numbers the ratio becomes 7:8. If the larger number exceeds the smaller number by 10. Find the number added.