IBPS SO Prelims Exam Model Paper 10

Given:
Ratio of number of days Ankur, Ankit and Karan worked = 4 : 3 : 2
Calculation:
Let the number of days Ankur, Ankit and Karan worked be 4x, 3x and 2x respectively
⇒ Work done by Ankur in 4x days = (

4x

20

)
⇒ Work done by Ankit in 3x days = (

3x

15

)
⇒ Work done by Karan in 2x days = (

2x

20

)
Total work done by Ankur, Ankit and Karan = 1
⇒ (

4x

20

) + (

3x

15

) + (

2x

20

) = 1
⇒ [

(12x+12x+6x)

60

] = 1
⇒

30x

60

= 1
⇒

x

2

= 1
⇒ x = 2
Ankur worked for 8 days [i.e. 4 × 2]
Ankit worked for 6 days [i.e. 3 × 2]
Karan worked for 4 days [i.e. 2 × 2]
∴ Required difference = 8 – 6
⇒ 2 days