To make over house 20 people need 3 days and 4 people need 15 days
What is ratio?
A ratio is a non-zero ordered pair of numbers a and b written as a / b. A percentage is a mathematical expression in which two ratios are specified to be equal.
How to find the time for people takes time to build a house?
When the no. of people will increase then the no. of days will decrease.
Therefore, no. of workers is inversely proportional to the no. of days.
a) Let 20 people will require X days to house make over.
Therefore, 10/20 = X/6
20 × X = 6 × 10
X = 6 × 10/20
X = 6 × 1/2
X = 3.
b) Let 4 people will require X days to house make over.
Therefore, 10/4 = x/6
4 × X = 6 × 10
X =60/4
X = 15
Hence 20 people need 3 days and 4 people need 15 days.
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