If 5 people can paint a house in 4 hrs, how long will it take 3 people??
(4/5) hr/manhouse * 3 man = 12/5 hr/house
= 2 2/5 hr
= 2.4 hr
If 5 people can paint a house in 4 hours, and now you have 2 less people, 3 people will take longer than 4 hours. Just think about that.
How can 3 people paint a house faster than 5 people???
Ans. 6 hours 40 minutes.
To find out how long it will take 3 people to paint the house, we can use a concept called "man-hours."
In this case, 5 people can paint a house in 4 hours. This means that the total man-hours required to paint the house is 5 people multiplied by 4 hours, which gives us 20 man-hours.
Since 3 people will be painting the house instead of 5, we can assume that the total man-hours required to paint the house will remain the same. So, we need to find out how many hours 3 people will take to complete 20 man-hours of work.
To do this, we can set up a proportion:
5 people / 4 hours = 3 people / x hours
Cross-multiplying the proportion, we get:
5 * x = 3 * 4
Simplifying the equation, we have:
5x = 12
Now, we can solve for x by dividing both sides of the equation by 5:
x = 12 / 5
Evaluating this, x is approximately equal to 2.4 hours.
Therefore, it will take 3 people approximately 2.4 hours to paint the house.