Question

A is twice as fast as B in doing a job that can be completed in 24 days if A and B work together. how many days will A take to complete the job.​

Answer 1

Answer:

36 days

Step-by-step explanation:

A and B together take 24 days to complete the job, which means they together can complete 1/24th of the job in one day.

A being twice fast as B, can complete double the part of what B completes. Hence,

$2b + b = \frac{1}{24}$

$b = \frac{1}{72}$

$a = 2b = \frac{1}{36}$

a, b being the speed at which they can complete the job independently.

a completes 1/36th part of the job in one day, and hence can complete the Job in 36 Days.