Question

A completes a job in 20 minutes and B does in 30 minutes, if they both do the same job,how much time does it take? plz reply

Answer 1

$\textbf {Hey there, here is the solution.}$

.............................................................................................

A completes the job in 20 mins

⇒ 1 min = 1/20 of the job

B completes the job in 30 mins

⇒ 1 min = 1/30 of the job

.............................................................................................

If A and B worked together,

1 min = 1/20 + 1/30

1 min = 1/12 of the job

.............................................................................................

Find time needed to complete the job:

1/12 of the work = 1 min

12/12 of the work = 1 x 12 = 12 mins

..............................................................................................

Answer: It will take them 12 mins to complete the job.

.............................................................................................

⭐$\textbf {Cheers}$⭐