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Question
It takes Sam 4 hours to rake the front lawn, while his brother, Dave, can rake the lawn in 2 hours. How long will it take them
to rake the lawn working together?
wwe, a ake the love in 2 hours. How long wait take them

Respuesta :

Answer:

1 hr 15 min

    or...

1.25 hrs

Step-by-step explanation:

Sam = 1/4 job = 1 hr

Dave = 1/2 job = 1 hr

1/4 +1/2 = 3/4

3/4 in one hour.

Thus they would take 1.25 hours to do the job together.

tatendagota

Answer:

3 hrs

Step-by-step explanation:

Thinking process:

Time taken by Sam = 4 hours

Time taken by Dave = 2 hours

Raking the lawn together will take them half the time each takes, so:

Sam = [tex]0.5*4[/tex]

       = 2 hrs

Dave = [tex]0.5 * 2[/tex]

         = 1 hr

Adding the hours gives = 2 + 1

                                        = 3 hrs