IBPS SO Prelims Exam Model Paper 9

Given:
A's 1 day's work =

1

12

B's 1 day's work =

1

16

Calculation:
Let C's 1 day's work be

1

C

.
(A + B)’s 1 day's work =

1

12

+

1

16

=

7

48

⇒ (A + B)’s 5 days Work = 5 ×

7

48

=

35

48

Remaining work = 1 –

35

48

=

13

48

⇒ 6.5 =

13

48

× C
⇒ C = 24
C's 1 day's work =

1

24

⇒ (A + B + C)’s 1 day's work =

1

12

+

1

16

+

1

24

=

9

48

=

3

16

∴ Required time =

3

4

×

16

3

= 4 days