A is thrice as good a workman as B and therefore is able to finish a job in 80 days less than B. working together, they can do it in
Choose one.
A) days	B) ½ days	C) days	D) days	E) days
Explanation:   B = 3A   3A – A =80 days   A = 40days   Then, B = 90 days   (A + B) = 40 × 90/ 120 = 30 days .   Answer: Option days
<result>D</result>
A is thrice as good a workman as B and therefore is able to finish a job in 80 days less than B. working together, they can do it in