The sum of two numbers is 40 and their difference is 20.
The sum of two numbers is 40 and their difference is 20. Find their product.
Answer/Solution
300
Steps/Work
Sol.
Let the numbers be x and y.
Then, x + y = 40 and
x - y = 20.
2x = 60 => x = 30 So y = 10
xy = 30 * 10 = 300
Answer : A
Let the numbers be x and y.
Then, x + y = 40 and
x - y = 20.
2x = 60 => x = 30 So y = 10
xy = 30 * 10 = 300
Answer : A