Adi does four-fifth of work in 40 days. He then calls in Bala and they together finish the remaining work in 6 days. How long Bala alone would take to do the whole work?

Options
- 80 days
- 90 days
- 75 days
- 60 days

CORRECT ANSWER : 75 days

Discussion Board
time and work

adi 4/5 work in=40 days

40*5/4=10*5=50days
a=50days;
reaming work=4/5-1=1/5;
adi and bala together done remaing work in 6 days
1/5=6 days
6*5/1=30
the work done by adi and bala is 30 in 6 days
work done by them in one day -work done by adi in one day
=1/50-1/30
taking lcm
=30-50/30*50
=75 days

shubham 05-7-2021 07:03 AM

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