Question

two men can do a piece of work in 6 hours and 4 hours respectively after the first had worked for two hours he is joined by the other by when should the work be completed​

Answer 1

Answer:

3.6 hours

Please mark BRAINLIEST

Step-by-step explanation:

1st=6

2nd= 4

first does 1/6 of work in one hour. given two hours= 1/6 *2 = 1/3

so, 2/3 left

so, 2nd one=1/4 in one hour

so, added the two to get total work done in one hour= 1/6 + 1/4 =  5 /12

now, rest time needed= 2/3 * 12/5

= 8/5

1.6 hrs

total time 3.6 hours