Question

a alone can do a piece of work in 12 days and B alone can do the same work in 15 days they started working together after 4 days B leaves the work in how many days a alone complete the remaining work​

Answer 1

Answer:4.8 days

Step-by-step explanation

A DO IN 12 DAYS

B DO IN 15 DAYS

TAKE LCM OF 12 & 15 = 60 TOTAL WORK

A EFFICIENCY 5

B EFFICIENCY 4

TOGATHER WORK FOR 4 DAYS SO WORK DONE BY TOGATHER IS 9×4= 36, REMAIN WORK IS 24 WHICH DONE BY A ALONE

SO 24÷5= 4.5