Bill is 5 years older than Sue is, and the sum of their ages is 67 years. How old is Bill ?

Bill is 36 years old

Step-by-step explanation:

Let Bill's age be "B" and Sue's age be "S"

Given that Bill is 5 years older than Sue, we can reason that the difference between Bill's and Sue's age must be 5 years, or:

B - S = 5     (eq 1)

We are also given that the sum of their ages is 67, or:

B + S = 67 (eq 2)

We can solve this system of equations via elimination (by adding the two equations).

(eq 1 ) + (eq2)

(B - S) + (B + S) = 5 + 67

2B = 72

B = 72/2

B = 36 years old

4/6 = 2/3

so it should take 3/3 hours per man. so 9 hours is the answer 3*3 =9

step-by-step explanation: