# math

posted by .

john types 20 pages in 40 min, sue types 20 pages in 30 min, bob types 20 pages in 24 min. working togehter how long to type 20 paqes

• math -

john types 20/40 or 1/2 page/min
Sue types 20/30 or 2/3 page/min
Bob types 20/24 or 5/6 page/min

combined rate = 1/2 + 2/3 + 5/6 or 2 pages per minute

time at combined rate = 20/2 or 10 minutes

## Similar Questions

1. ### math

Kendis types 150 words in 2 min, how many words does she type in 1 min?
2. ### Math Elementary

Carol reads four times as many pages than John. They read 40 pages together. How many more pages did Carol read than John. My answer is Carol read 16 pages more than John. Am I correct.
3. ### math

A secretary can type 8 pages per hour.There are a total of 96 pages to type. How many pages remain to be typed after 6 hours?
4. ### math

can you help math question units rates find unit rate for each situation read 50 pages in 1 hr 25 min i got : 50 divide by ttl 85 min and got 0.588 = .59 hike 5 mile in 2hr 10 min i got: 130 min ttl divide 5mile is got 26 mile per …
5. ### Math

if takes bob 40 mins to type 6 pages how many pages can bob take type in 2.5 hours
6. ### Math

Decide whether the rates are equivalent A. 30 beats per 20 sec, 90 neats per 60 sec B. 15 pages in 20 min., 10 pages in. 15 min
7. ### math

amos is using a computer program to graph the function N(p)=-73p-2818. He wants to see the intercepts. Which minimum values should he use to set up the viewing window?
8. ### math

It takes Bill 24 minutes to type and spell check 10 pages. Find how many pages he can type and spell check in 5.5 hours. Round to the nearest whole number if necessary. A. 55 pages B. 138 pages C. 792 pages D. 229 pages
9. ### math

secretary can type 12 pages per hour. There are a total of 152 pages to type. How many pages remain to be typed after 9 hours?
10. ### Math

A typist types 70 pages in 3 hours 30 minutes how long will she take to type 300 pages

More Similar Questions