Question
The product of 2 numbers is 1575 and their quotient is 9/7. Then the sum of the numbers is _______
A. 90
B. 80
C. 78
D. 74
Answer: B
Solution:
Let the numbers be x and y .
=> xy = 1575 And x/y = 9/7
=> xy/x/y = 1575/9/7
=> y^2 = 1225
=> y = 35 and x = 45
=> The sum of the numbers = 45 + 35
=> 80
