The ratio of two numbers is 5 : 6. If their product is 1920, what is the sum of both numbers?
Show answer & explanation
Correct answer: D
Explanation
The correct answer is Option 4 i.e. 88.
Ratio = 5 : 6
Product = 1920
Let the numbers be 5x and 6x.
⇒ 5x × 6x = 1920
⇒ 30x2 = 1920
⇒ x2 = 64
⇒ x = 8
Sum of two numbers = 5x + 6x = 11x = 11 × 8 = 88