Question

A and b can do a work in 5 days b and c can do a piece of work in 7 days a and c can do a piece of work in 4 days find a, b, c

Answer 1

Answer:

5, 7, 4 LCM = 140 [ Total work ]

Efficiency = 28, 20, 35

A+B one day work = 28

B+C ,,,,,,,,,,,,,,,,,,,,,,,,,, = 20

C+A ,,,,,,,,,,,,,,,,,,,,,,,,,, = 35

Adding all ,

2(A+B+C) = 83

(A+B+C) = 41.5

A one day work = 41.5 - 20 = 21.5

B ,,,,,,,,,,,,,,,,,,,,,,,,, = 41.5 - 35 = 6.5

C ,,,,,,,,,,,,,,,,,,,,,,,,, = 41.5 - 28 = 13.5

A will complete whole work in = 140 ÷ 21.5 = 6.5 days .

B will complete whole work in = 140 ÷ 6.5 = 21.5 days .

C will complete whole work in = 140 ÷ 13.5 = 10.3 days .

[ Mark as brainlist ]