Symbiosis National Aptitude Test SNAP 2019 Paper

Let Mitesh finish a work in n days then Ritesh finish the same work in (n – 30) days
ATQ,
2×

1

n

=

1

(n−30)

2(n – 30) = n
⇒ n = 60
So, Mitesh finish the work in 60 days
and Ritesh finish the work in 30 days
Time taken by them to finish the work, while working together
=

60

2+1

=

60

3

= 20 days