Question

a task s 40 mint to do a job .b task 1 hours to do the same job a,b and c start doing that job together .they complete it in only 15 mintus had can been alone how much time would he have taken to do job​

Answer 1

Answer:

Step-by-step explanation:

Let Total Work = LCM(2,3,4) = 12 units.

A does 12/4= 3 units per hour.

A + C complete 12/2 = 6 units per hour.

=> C complete 6 - 3 = 3 units per hour.

B + C complete 12/3 = 4 units per hour.

=> B complete 4 - 3 = 1 unit per hour.

=> B alone can complete work in 12/1 = 12 hours.

Answer 2

Answer:

Step-by-step explanation:

40minutes

Answer 3

Answer:

Step-by-step explanation:

40minutes