Question

Deepa and Arun can do a piece of work in 20 days and 30 days respectively. They work together and Deepa leaves 5 days before the work is finished. Arun finished the remaining work alone. In how many days is.the total work finished?

Answer 1

Days Deepa take to do work - 20 days

Days Arun take to do work - 30 days

days Arun left before the work is finished - 5 days

total work taken =30+25

=55

Answer 2

Answer:

Step-by-step explanation:

Deepa =20 days

Arun =30 days

Take LCM for 20 and 30=60

Deepa=3 units per day

Arun=2 units per day

If two persons to finish the work=(1/20+1/30)

=1/12

Deepa leaves after 7 days(12-5)

7 days work =35

Remaining work=25

Arun finish the remaining work=25/2

=12.5 days

Total days to complete the work=7+12.5=19.5 days