if 12 person can do the work in 15 days . in how many days same work be completed by 20 person
Answers
Answered by
21
Answer
25 days
Solution
Given
12 person can do work in 15 days
1 person can do the work in 15/12 days
or 5/4 days
Apply unitary method
Days required by 1 person to do the work = 5/4
∴ Days required by 20 person = 5/4 × 20 days
=> 5 × 5 days
=> 25 days
Answered by
1
12 persons = 15 days
20 persons = ? days
This is in direct proportion which means
X1/y1 =x2/y2
So here x1 =12 persons
Y1 = 15 days
X2 = 20 persons
Y2 =?
We need to find y2
By cross multiplication
12/15 =y2/20
15 x20/12 x y2
= 25 days
Hope this helps !
20 persons = ? days
This is in direct proportion which means
X1/y1 =x2/y2
So here x1 =12 persons
Y1 = 15 days
X2 = 20 persons
Y2 =?
We need to find y2
By cross multiplication
12/15 =y2/20
15 x20/12 x y2
= 25 days
Hope this helps !
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