Math, asked by pushkar8164, 1 year ago

Yogesh requires 3 days more than Vivek to do a work completely. If both

of them work together, the work can be completed in 2 days. Find the

number of days required for each of them to do the work completely.

Answers

Answered by ankitagni
131
here is your answer dear frnd
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pushkar8164: thank
ankitagni: welcm☺️
pushkar8164: Krishna Electricals had bought a TV from a wholesaler at Rs 36000.
The marked price on it in Krishna Electricals was Rs. 50000. If it was
sold to Kalyan Deshmukh at 10% discount, calculate the input GST
and output GST for Krishna Electricals if the rate of GST is 18%.
ankitagni: now check ans i have explained
Answered by MavisRee
85

Answer:

Number of days required by Vivek = 3 days and

Number of days required by Yogesh = 6 days

Step-by-step explanation:

Let us suppose Vivek completes the work in ' x ' number of days

So,

Vivek's 1 day work = \frac{1}{x}

Yogesh requires 3 days more than Vivek to do a work completely

So,

Yogesh completes the work in ' x + 3 ' days'

Yogesh's 1 day work = \frac{1}{x+3}

When they are working together, work is completed in 2 days

Therefore,

\frac{1}{x} + \frac{1}{x+3} = \frac{1}{2}

\frac{x+3+x}{x(x+3)} = \frac{1}{2}

\frac{2x+3}{x^{2}+3x} = \frac{1}{2}

4x + 6 = x² + 3x

x² + 3x - 4x - 6 = 0

x² - x - 6 = 0

Solving for x:

x² - 3x + 2x - 6 = 0

x ( x - 3 ) + 2 ( x - 3) = 0

( x + 2 ) ( x - 3 ) = 0

x = - 2 or x = 3

Since, Number of days cannot be negative

x = 3

That is,

Vivek completes the work in 3 days

And Yogesh completes the work in x + 3 days = 3 + 3 = 6 days

Hence,

Number of days required by Vivek = 3 days and

Number of days required by Yogesh = 6 days


Harshsalve1156: great explanation
ankitagni: thanks
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