Combine Work Formula

Question 1

Combined work formula for two people

Answer 1

T = ab / a + b

Question 2

Combined work formula for 3- person work

Answer 2

1/a + 1/b + 1/c = 1/T (often more efficient to use ) or

T = abc / ab + bc + ac

To add fractions with unlike denominator, find the common denominator and re-write each fraction with the common denominator. Add the numerators and carry across the common denominator. Reduce is necessary.