SBI PO 03 July 2016 Paper

Time taken by C = x days
C is 40% less efficient than A.
∴ Time taken by A= 0.6x days
(A + B)’s 1 day’s work
=

1

10

... (i)
(B + C)’s 1 day’s work =

1

15

... (ii)
Equation (i) – (ii),
(A – C)’s 1 day’s work
=

1

10

−

1

15

=

3−2

30

=

1

30

⇒

1

0.6x

−

1

x

=

1

30

⇒

10

6x

−

1

x

=

1

30

⇒

5

3x

−

1

x

=

1

30

⇒

5−3

3x

=

1

30

⇒

2

x

=

1

10