Math question?

Question

Sally painted a house in 6hrs and john painted the same house in 4hrs how long would it take them to paint the house together? I need to know the equation to this problem!

Answer 1

1/t = 1/6 + 1/4. Figure out why this is.

Answer 2

Sally paints 1/6 of a house in one hour. John paints 1/4 of a house in one hour. Together they paint 1/6 + 1/4 = 5/12 of a house in an hour. So it will take them 2.4 hours to paint the house.

Answer 3

In 1 hour, Sally paints 1/6 of the house, and John paints 1/4.

1/6 + 1/4 = 5/12, so...

1/(5/12) = 12/5 = 2.4 hours

Answer 4

sally in 1 hour paints 1/6 of the total work.
similarly john does 1/4 of the total work in 1 hour
so they do 1/6+1/4 workin 1 hour
1/6+1/4=2/12+3/12=5/12
hence they will complete the work in 12/5 hours i.e.2hrs,24 min

Answer 5

so sally did 1/6 of the house in one hour and john did 1/4 in an hour. find the common denominator which is 12. so its 2/12 + 3/12 = 5/12 in an hour. in two hours there will be 10/12. u need 2/12 of an hour left. 2/12 of 60 min is 10 min. 2 hr. 10 min.

Answer 6

fraction of house painted by sally in an hour
= 1/6 = 4/24
fraction of house painted by john in an hour
= 1/4 =6/24
therefore, they would take an hour to paint 10/24 of the house.
For the whole house to be painted,
they would take 2h 24 mins together.
Equation:
1/(4+6)*24= 2.4h
=2h 24mins

Answer 7

First, let's figgure out how much of a house each of them can paint in one hour. This is simple.
1 house divided by how many hours it takes for them to paint it.
John 1/4
Sally 1/6

Then, let's put them on equal ground. To do this, we will make it so their denominators are equal.
John 1/4->6/24
Sally 1/6->4/24

Then, between the two of them, let's figgure out how much of a house they can paint:
6/24+4/24=10/24=.416
41.6 percent of the house is finished each hour between the two of them.

Now, how many hours would it take for them to finish?
Divide 100 percent of the house by 41.6 percent.
100/41.6=2.41 hours OR 2 hours 24 minutes and approximately 36 seconds.

Answer 8

Easiest way is product over sum:
4*6/(4+6) = 24/10=2.4 hours

Answer 9

solution- 6hrs + 4 hrs =10hrs
and there r 2 ppls
therefore
10/2 = 5hrs

Answer 10

5 hours ... because Sally and John made love for an hour ...then Sally fell asleep while John finished ....