SSC CHSL 11 Aug 2021 Shift 2 Solved Paper

Given, A completes 20% of the work in 5 days.
∴ Total time taken to complete the whole work by A=‌

5

20

×100=25 days and B completes ‌

1

3

th of the work in 5 days.
∴ Total time taken to complete the whole work by B=5×3=15 days
According to the question, 3 days work
=‌

3

25

+‌

3

15

=‌

3

25

+‌

1

5

=‌

3+5

25

=‌

8

25

Remaining work =1−‌

8

25

=‌

25−8

25

=‌

17

25

‌ units ‌
∴ Total number of days needed for complete the work =(25×‌

17

25

+3) days =20 days