Thursday

November 27, 2014

November 27, 2014

Posted by **Guadalupe** on Monday, May 14, 2007 at 5:19pm.

Almir can seal a driveway in 4 hours. Working together, he and Louis can seal it in 2.3 hours. How long would it take Louis to seal it working alone?

Thanks in advance.

D:3+4D=19

Driveway (D) = Rate * Time

let Louis' time alone be t hours

so Louis' rate is D/t

Almir's rate is D/4

their combined rate is D/2.3

so D/4 + D/t = D/2.3

divide by D,

1/4 + 1/t = 1/2.3

2.3t + 9.2 = 4t

I got t=5.411 hours

So Louis' rate alone is 5.4 Hours

thanks!

**Answer this Question**

**Related Questions**

English - 1. There is a seal mark on the piece of paper,for I pressed the seal ...

Math - Dorothy and Rosanne are baking cookies for a party. Working alone, ...

Algebra - Dorothy and Rosanne are baking cookies for a party. Working alone, ...

Math - Barry can do a certain job in 3 hours, whereas it takes Sanchez 5 hours ...

Physics - In diving to a depth of 979 m, an elephant seal also moves 104 m due ...

physics - In diving to a depth of 558 m, an elephant seal also moves 925 m due ...

physics - In diving a depth of 735m, an elephant seal also moves 600m due east ...

Algebra 1 (Reiny) - 1. It takes Dustin 2 hours to shovel the snow from his ...

College Algebra - It takes Todd 3 hours longer than Tom to paint a 4x5 feet ...

Algebra 1--Please, help me! - 1. It takes Dustin 2 hours to shovel the snow from...