Question

It takes two hours for a person X to mow the lawn. Y can mow the same lawn in four

hours. How long (in minutes) will it take X and Y, if they work together to mow the lawn?​

Answer 1

Answer:

40 minutes

Step-by-step explanation:

since it takes 2 hours for the person X to now to lawn,

he can mow 1/2 off the loan in 1 hour. ....(1)

since it takes 4 hours for the person Y to now to lawn,

he can mow 1/4 of the lawn in 1 hour ....(2)

From (1) and (2) ...

Both of them together can complete

$\frac{1}{2} + \frac{1}{4}$

of the work.

Now...

$\frac{1}{2} + \frac{1}{4} \\ = \frac{1 + 2}{2} \\ = \frac{3}{2}$

Thus 3/2 of the work can be completed in one hour.

Work can be completed in 2/3 of the hour i.e. 40 mins

Answer 2

Answer:

Brainly.in

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Secondary SchoolMath 5 points

It takes two hours for a person X to mow the lawn. Y can mow the same lawn in four

hours. How long (in minutes) will it take X and Y, if they work together to mow the lawn?

Ask for details Follow Report by Roysharanjeet 4 days ago

Answers

THE BRAINLIEST ANSWER!

Utsah47Brainly

Utsah47Brainly Expert

Answer:

40 minutes

Step-by-step explanation:

since it takes 2 hours for the person X to now to lawn,

he can mow 1/2 off the loan in 1 hour. ....(1)

since it takes 4 hours for the person Y to now to lawn,

he can mow 1/4 of the lawn in 1 hour ....(2)

From (1) and (2) ...

Both of them together can complete

\frac{1}{2} + \frac{1}{4}

of the work.

Now...

\frac{1}{2} + \frac{1}{4} \\ = \frac{1 + 2}{2} \\ = \frac{3}{2}

Thus 3/2 of the work can be completed in one hour.

Work can be completed in 2/3 of the hour i.e. 40 mins.