Question

x can do work 30 days and y can do 40 days in what days both working together can do it

Answer 1

Answer:

Step-by-step explanation:

use the formula for this question

1/x+1/y= 1/answer

= 1/30+1/40=1/ans

7/120= 1/ans

hence answer= 120 /7 days

Answer 2

Answer :-

120/7 days is the correct answer.

Given:-

• Time taken by X to complete the work = 30

• Time taken by Y to complete the work = 40

To find :-

Number of days required when they work together

Solution :-

Total work = L.C.M (30,40)

= 120

Now we know that,

Efficiency of A = Total work/Total time

Efficiency of A = 120/30

Efficiency of A = 4

Similarly,

Efficiency of B = 120/40

Efficiency of B = 3

Hence :-

Total time taken by A and B working together = 120/7 = 17 ⅐days.