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vampirchik [111]
3 years ago
9

4 builders are building some new classrooms at Trinity. It takes them 5 months to build the classrooms. How long will it take 10

builders?
Mathematics
2 answers:
alexgriva [62]3 years ago
8 0

Answer:

\boxed{2months}

Step-by-step explanation:

B1 = 4

M1 = 5

B2 = 10

M2 = x (we have to find this)

<u><em>Since it is an inverse proportion (more builders will take less time and vive versa), we'll write it in the order of</em></u>

=> B1 : B2 = M2 : M1

=> 4:10 = x : 5

<u><em>Product of Means = Product of Extremes</em></u>

=> 10*x = 4*5

=> 10x = 20

Dividing both sides by 10

=> x = 2 months

So, it will take 2 months to build classrooms by 10 builders.

BigorU [14]3 years ago
7 0

Answer:

it takes

\boxed {\red {2 \:  \: months}}

for 10 builders

Step-by-step explanation:

4 \:  \:  \: builders = 5 \: month \\ 10 \: builders =  x

Let us solve

4 = 5 \\ 10 = x

so

4 = x \\ 10 = 5

use cross multiplication

5 \times 4 = 10 \times x \\ 20 = 10x \\  \frac{20}{10}  =  \frac{10x}{10}  \\ \green {x = 2}

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