anonymous 4 years ago jack usually mows his lawn in 6hr. mary mows the same yard in 5hr. how long will it take them to mow the yard together? i got 2 8/11?

1. amistre64

how much does J cut in 1 hour? how much does M cut in 1 hour? J+M = total cut in 1hour

2. amistre64

flip that number for time taken ...

3. amistre64

$\frac{1}{6}+\frac{1}{5}=\frac{5+6}{5*6}$ flips to:$\frac{30}{11}$hours to complete

4. amistre64

5. anonymous

so would i write 2 8/11 for my answer?

6. anonymous

i dont think so

7. anonymous

oh i see if i divide it out from 30/11 it will be that

8. amistre64

they tend to want the time in hrs min sec

9. anonymous

it will be mary plus jack= 11 hours together

10. amistre64

2 hours and 8/11 of another

11. amistre64

no abdullah; thats incorrect

12. amistre64

if 2 people work on the same yard they dont finish it in longer time then if they do it alone

13. anonymous

ok

14. amistre64

well, not mathically at least lol

15. amistre64

60/11 = an hour divided up into 11th parts; times 8 = minutes taken in an hour

16. amistre64

2 hours, 43 mins, and a little over 30 secs more

17. anonymous

i get it