A is thrice as good a workman as B and so takes 60 days less than B for doing a job. The time in which they can do the job together is = ?

$22\frac{1}{2}\,{\text{days}}$$

A is thrice as good a workman as B and so takes 60 days less than B fo

1.	A is thrice as good a workman as B and so takes 60 days less than B for doing a job. The time in which they can do the job together is = ?
A.	$22\frac{1}{2}\,{\text{days}}$$
B.	${\text{30 days}}$$
C.	${\text{45 days}}$$
D.	${\text{60 days}}$$
Answer» B. ${\text{30 days}}$$