Question

A, B तथा C एक काम को 20, 30 और 60 दिनों में कर सकते हैं l A इस काम को B तथा C के प्रति तीसरे दिन की सहायता से कितने दिनों में पूरा कर सकेगा? ​

Answer 1

Answer:

15 days

Step-by-step explanation:

A -----> 20 days

B -----> 30 days

C -----> 60 days

let total work be 60 ( LCM of 20,30&60)

now

efficiency = work/time

so

efficiency of

A = 60/20 = 3

B = 60/30 = 2

C = 60/60 = 1

now

according to the question,

A is assisted by B & C every third day

so

3 days work =

A's 2 days work + (A+B+C) 1 day work

i.e.

=> 3×2 + (3+2+1)

=> 6 + 6 = 12

3 days work = 12

so

1 day work = 12/3 = 4

now

total work will be done in = =>

time = work /efficiency

=> 60/4 = 15 days (answer )

Answer 2

Answer:

15 day

Step-by-step explanation:

this answer is correct answer

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