Sunday

November 23, 2014

November 23, 2014

Posted by **Valentine** on Thursday, April 21, 2011 at 4:03pm.

- alegbra -
**Henry**, Friday, April 22, 2011 at 9:38pm1/t= 1/4 + 1/5,

1/t = 5/20 + 4/20 = 9/20,

t = 20/9 = 2.2 hours.

Or

t = 4*5 / (4+5) = 20/9 = 2.2 hours.

**Answer this Question**

**Related Questions**

Math - Jack usually mows his lawn in three hours. Marilyn can mow the same yard ...

Algebra - Jack usually mows his lawn in 4 hours. Marilyn can mow the same yard ...

algebra - Jack usually mows his lawn in 6 hours. Marilyn can mow the same lawn ...

MATH - Jack usually mows his lawn in 3 hours. Marilyn can mow the same yard in 5...

math - Jack usually mows his lawn in 4 hours. Marilyn can mow the same in 5 ...

algebra - jack usually mows his lawn in 4 hours mariltn can mow the same yard in...

algebra - Jack usually mows his lawn in 4hrs Marilyn can mow the same yard in ...

math/117 - Jack usually mowes his lawn in 7 hours. Marilyn can mow the same yard...

algebra - Jack usually mows his law in 5 hours. Marilyn can mow the same law in ...

Algebra II - Jack usually mows his lawn in 6 hours. Marilyn can mow the same ...