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10. It took 20 men 2 days to finish repainting the school. How long might the job have taken if only 15 men have been working?

Equation: m = r/t

• where m = men , r = rate , t = time

Given: m = 20 , r = ? , t = 2

Solving for the rate:

• m = r/t
• 20 = r/2
• 20×2 = r
• 40 = r

Then , given that: m = 15 , r = 40 , t = ?

Solving for time

• m = r/t
• 15 = 40/t
• 15×t = 40
• t = 40/15
• t = 8/3 or 2.67 days

Now , we will convert 0.67 to hours

0.64 × 24 = 16 hours

» Therefore , it will took 2 days and 16 hours

• 2 days and 16 hours

2 days and 16 hours

Step-by-step explanation:

First we have to solve for the rate

Given: men = 20 r = ? days = 2

Formula: m = r/d

Solution:

20 = r/2

20 x 2 = r

40 = r

Next we have to find the days

Given: m = 15 d = ? r = 40

Formula: m = r/d

Solution:

15 = 40/d

15 x d = 40

d = 40/15 so we just have to Lowest Term

d = 8/3 = 2.67 or 2 days

Convert the 0.64 to hours so..

0.64 x 24h = 16 hours

So tha answer is

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