Math

If sally can paint a house in 4hrs, and John can paint the same house in 6hrs, How long will it take for both of them to paint the house together?

  1. 👍
  2. 👎
  3. 👁
  1. Sally's rate = house/4
    Johns rate = house/4

    working together = house/(house/4 + house/6)
    = house/(10house/24)
    = house * 24 10house
    = 24/10 = 2.4

    it will take 2.4 hrs or 2hrs, 24 minutes

    1. 👍
    2. 👎

Respond to this Question

First Name

Your Response

Similar Questions

  1. Math

    A HOUSE-PAINTER MIXED 5 GALLONS OF BLUE PAINT WITH EVERY 9 GALLONS OF YELLOW PAINT IN ORDER TO MAKE A GREEN PAINT.WHICH RATIO OF GALLONS OF BLUE PAINT TO GALLONS OF YELLOW PAINT WILL MAKE THE SAME SHADE OF GREEN PAINT?

  2. Math

    Mr.Rivas bought a can of paint.He used 3/8 of it to paint a bookshelf. He used 1/4 of it to paint a wagon. He used some of it to paint a birdhouse and has 1/8 of paint left. How much did he use for the birdhouse

  3. Algebra

    Sally can paint a room in 4 hours while it takes Steve 7 hours to paint the same room. How long would it take them to paint the room if they worked​ together?

  4. Math

    Kevin is mixing paint to make orange the ratio of red paint to yellow paint is 3 oz to 5 oz.How much yellow paint should he mix with 9 oz of red paint?

  1. Physics

    A partly-full paint can has 0.83 U.S. gallons of paint left in it. (a) What is the volume of the paint, in cubic meters? (b) If all the remaining paint is used to coat a wall evenly (wall area = 12 m2), how thick is the layer of

  2. Math

    need direction on part c. Rosa and her friend build & paint a tree house. On monday they paint 2/5 of the tree house. On tuesday they paint 3/7 of the house. A - painting of the house need to be finished on wednesday. how much

  3. math

    Alex is painting a house. He uses 1/3 of the paint he bought on the dining room. He uses twice as much on the living room as on the kitchen, where he uses 1 1/2 gallons. He has 1 1/2 gallons of paint left. How much paint did Alex

  4. math

    the total cost c a painter charges to paint a house depends on the number h of hours it takes to paint the house. this situation can be represented by the function rule c=15h+245. What is the total cost if the painter works for

  1. MATH

    john mixed 3/4 liter of yellow paint with 1 1/4 liters of red paint to make 2 liters of orange paint. . He needed more orange paint. . To make a new batch of orange paint, he used exactly 1 liter of red paint. Using the same

  2. decimals

    Mark wants to paint a mural. He has 1 1/3 gallons of yellow paint, 1 1/4 green paint, and 7/8 gallon of blue paint. mark plans to use 3/4 gallon of each paint color. How many gallons of paint will he have left after painting the

  3. Math

    Patty wants to use at most 6 gallons of paint to cover her house and garage. The house takes 5 times as much paint as the garage. Which inequalit best represents the situation if g represents the amount of paint that can be used

  4. AMDM1

    The amount of paint a painter needs is directly proportional to the area of the object he is painting. If a painter needs g gallons of paint for every s square feet that he paints, what is the total amount of paint that he needs

You can view more similar questions or ask a new question.