Thursday

July 24, 2014

July 24, 2014

Posted by **hiba** on Wednesday, November 30, 2011 at 6:13pm.

answer 9 hour or 4 hour

- plz answer ....plz -
**hiba**, Wednesday, November 30, 2011 at 7:28pmplz answer ....plz

- 3 grade math -
**Reiny**, Wednesday, November 30, 2011 at 7:55pmrate of first man = 1/6 lawn/hr

rate of 2nd man = 1/12 lawn/hr

combined rate = 1/6 + 1/12 = 3/12 or 1/4 lawn/h

time takes when both cutting = 1/(1/4)

= 1 (4/1) = 4 hrs

(how can the combined work take 9 hours, if one guy alone can do it in 6 hrs??)

- 3 grade math -
**hiba**, Wednesday, November 30, 2011 at 8:05pmthank you so much .........

- 3 grade math -
**peter**, Sunday, February 5, 2012 at 7:36pm12+6=18

**Related Questions**

math 11th grade - If a man runs for an hour and a half at 8 miles an hour due ...

English - 1. I'm going to cut tall grass around my ancestor's tomb/grave on ...

math - If a man runs for an hour and a half at 8 miles an hour due south; and ...

MATH - iF MAN RUNS AN HOUR AND A HALF AT 8 MILES AN HOUR DUE SOUTH, AND THEN HE ...

math - Enrique charges $5 for every 1/5 hour he spends walking dogs. In the ...

math - Enrique charges $5 for every 1/5 hour he spends walking dogs. In the ...

Intergated chemistry/physics - A 200 man is running 3 miles per hour and ...

math - tom was paid $4.50 per hour for painting a fence and $ 6.50 per hour for ...

5th grade math - I need help with this problem..the answer and how you got it. ...

algebra - A man (we'll refer to him as man 1) starts from his home at 8 A.M. and...