6 labour complete a work in 12 days. How many labours should added to complete the works in 8 days?
1 answer:
Answer:
9 labours
Step-by-step explanation:
In order to solve this, we must know which kind of proportionality is this. There are two types of proportions, direct and indirect/inverse proportions. In direct proportion, if one quantity increases, the other quantity also increases.
In indirect proportion, if one quantity increases, the other decreases and vice versa.
As per this question, we know if the number of labour increases, the number of days to complete a work decreases, thus proving that this is an indirect/inverse proportion.
6 labours => 12 days
x labours => 8 days
Since its an inverse proprotion, multiply 6 with 12, and x with 8.
8x = 6 × 12
x =
∴ x = <u>9 labours</u>
You might be interested in
Answer:
The population of the town of 2020 is approximately 6847
Step-by-step explanation:
The given population of the small town is 2002, P₀ = 10,800
The annual percentage decrease in the population, r = 2.5%
The date at which the new population,'P', is required = 2020
Therefore;
The number of years over which the population changes, 't', is given as follows;
t = 2020 - 2002 = 18
The number of years over which the population changes, t = 18 years
Given that the population is decreasing, we get;
The general formula for exponential decay is given as follows;
Therefore, the population, 'P', of the town of 2020 which is in t = 18 years, is given as follows;
Given that the population is given in whole numbers, we round down to the nearest whole number population of people as follows;
The population of the town of 2020, P ≈ 6847.