Sally does 1 / 4 of the job in one hour and John does 1 / 6 , so together they do ( 1 / 4 + 1 / 6 ) = 3/12 + 2/12 = 5/12 of the job in one hour So it would take 12...
1 Answers · Education & Reference · 26/05/2010
Pam can do 4 times the work of John Pam can do 6 times the work of Susan So...they all work together, Pam contributes 1 unit of work. John contributes one...
8 Answers · Education & Reference · 08/08/2010
...3/ 4 x 6 10/12=27/5 5/ 6 / 3/10=25/ 6 8 4 /7 / 3 1 /3=117/40 It took John 2 1 / 4 hours to drive 135 ... many miles per hour did john drive? John drives 60...
13 Answers · Education & Reference · 03/04/2009
sally painting speed = 1 house / 4 hours john painting speed = 1 house / 6 hours 1 house painted by sally and john collaboratin together: time they...
2 Answers · Education & Reference · 25/01/2011
...hour. If together it takes x hours, Sally can do 1 / 4 of the job in 1 hour, John can do 1 / 6 , and together they can do 1 /x. So 1 / 4 + 1 / 6 = 1 /x 3/12 + 2/12 = 1 /x 5...
3 Answers · Education & Reference · 14/02/2010
- John gave 1 / 4 which comes out to be $12 (because 48 divided by 4 ...12) -Paul gave 1 /8 which comes out to be $ 6 (because 48 divided by 8 is 6 ) -Mike ...
3 Answers · Education & Reference · 15/11/2010
...more exact answer, you can use fractions like this: Sally can paint 1 / 4 of the house in an hour. John can paint 1 / 6 of the house in an hour. If we convert those fractions to ...
4 Answers · Education & Reference · 21/10/2010
... Sally can do it ALONE in 4 hours, with help, it...+B) = ( 4 * 6 ) / ( 4 + 6 ) = 24 / 10 = 2. 4 ... paints 1 / 4 of the house per hour John paints 1 / 6 of the...
4 Answers · Education & Reference · 23/10/2009
...house , the same work = 1 . So we can get the efficiency of sally is 1 / 4 , john 's is 1 / 6 the total efficiency of both ones is ( 1 / 4 ) + ( 1 / 6 ) = ( 5/12 ) so the...
2 Answers · Education & Reference · 08/11/2009
... Sally can paint a house in 4 hours, then in one hour, she can do 1 / 4 of the job. If John can paint a house in 6 hours, then in one hour, he can do 1 / 6 of the job. If they work together...
9 Answers · Education & Reference · 13/06/2009