Wednesday

April 16, 2014

April 16, 2014

Posted by **phoebe** on Friday, December 3, 2010 at 12:25am.

A stoplight flashes red for 50seconds, yellow for five seconds, and green for 65 seconds. In a 24 hour period, how long is the light red?

- math, 5th grade -
**drwls**, Friday, December 3, 2010 at 12:32amIt is red 50/(50 + 5 + 65) = 5/12 of the time

5/12 of 24 hours is 10 hours.

- math, 5th grade -
**phoebe**, Friday, December 3, 2010 at 12:36amThank you

**Related Questions**

math - a stoplight flashes red for 50 seconds, yellow for 5 seconds, and green ...

math 3rd grade - Sam is making a necklace she uses 2 red beads, then 1 yellow ...

Math 7th grade - Susan has red, blue, and yellow sweaters. Joanne has green, red...

Probability help!? - I have a bag of 20 m&m's. 6 are red; 7 are blue; 4 are ...

5th Grade math - To: bobpursley - how do you teach a 5th grader how to figure ...

Math - the green light flashes every 3 seconds,the red every 5 seconds and white...

physics - These are problems I have been stuck on and can't figure out. Help ...

math - a paint color is made by mixing red and yellow paint. the ratio of red to...

5th grade - fifteen:five::nine:_ _ _ _ _ i can't figure it out...

Math - There are 2 opaque bags, each containing red and yellow blocks. Bag 1 ...