A can do as much work in 2 days as b can do in 3 days and b can do as much in 4 days as c in 5 days.A piece of work takes 20 days if all work together.How long would b take alone
Answers
Answer:
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Step-by-step explanation:
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Answer:
7days
Step-by-step explanation:
This is a question on ratio
The persons mentioned all work in the following ratios
A : B : C
2 : 3
4 : 5
To get the exact ratio within which the following people work we combine the ratios in the following way
A = 4 × 2 = 8
B = 4 × 3 = 12
C = 3 × 5 = 15
The new ratios therefore become
A : B : C
8 : 12 : 15
They all worked together in twenty days.
This means that the sun of their ratios is equal to the days that the worked together
The sum of their ratios is
8 + 12 + 15 = 35
We are supposed to find the number of days taken by B
If 35 is equal to 20 days
What of 12
12 × 20/35
12 × 20 = 240
240 ÷ 35 = 6.8
When we round off we get 7 days