Question

A contractor who had a work force of 630 man , undertook to complete a portion of a stadium in 14 months. He was asked to complete this job in 9 months.
How many extra persons he had to employ?

Answer 1

Answer:

The number of extra people required is 350.

Step-by-step explanation:

Given,

Let the number of people required to complete a job in 9 months be 'x'.

Number of persons that complete work in 14 months = 630

The number of persons required to complete the work in 9 months is

$\frac{630}{x} = \frac{9}{14}\\\\ x = \frac{630\times 14}{9}\\\\ x = 980\ persons$

Therefore, the extra persons required to complete the work = 980 - 630 = 350.

Hence, the extra person contractor had to employ is 350.

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Answer 2

Answer:

The correct answer to this question is 350 persons.

Step-by-step explanation:

Given: A contractor who had a work force of 630 man , undertook to complete a portion of a stadium in 14 months. He was asked to complete this job in 9 months.

To find: How many extra persons he had to employ

calculation:

Let the number of people required to complete a job in 9 months be 'x'.

Number of persons that complete work in 14 months = 630

The number of persons required to complete the work in 9 months

= $\frac{630}{x} = \frac{9}{14}$

$x= \frac{630*14}{9} \\x = 980$

Therefore the value of 'x' is 980 person.

Now, the extra persons required to complete the work

=$980 - 630 = 350.$

So, the extra person contractor had to employ is 350.

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