1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Gennadij [26K]
3 years ago
12

Janet can do a job in 3 hours, and Garry can do the same job in 2 hours. If Janet works for 1 hour before Garry comes to help, h

ow long will it take them to do it together.
Mathematics
2 answers:
lidiya [134]3 years ago
8 0

Answer:

48 minutes

Step-by-step explanation:

Given that:

Time taken by Janet = 3 hours

Janet's rate = 1/3 job / hour

Time taken by Garry = 2 hours

Garry's rate = 1/2

Rate of working together :

1/3 + 1/2 = (2 + 3) /6 = 5/6 job/hour

If Janet works for one hour before Garry joins ;

1/3 of the job has been done by Janet

1 - 1/3 = 2/3 of the job left

Hence to finish the job together, it will take :

Fraction of JOB left ÷ rate of working together

(2/3 ÷ 5/6)

= 2 /3 * 6/5

= 12 / 15

= 4 / 5 hours

To minutes

(4/5) * 60

= 240/5

= 48 minutes

Liono4ka [1.6K]3 years ago
5 0

Answer:

1 4/5

Step-by-step explanation:

You might be interested in
Show all work & simplify ³√64
Assoli18 [71]
4
-∛64 means that x³= 64
 4 x 4 x 4= 64
4 0
3 years ago
O Here is a list of numbers:<br> 19, 4, 7, 2, 10, 5, 19, 2, 12<br> State the median.
kkurt [141]

Answer:

10

Step-by-step explanation:

median is the middle number of the list of numbers.

thereby counting through, the middle number which is the fifth number is 10

4 0
2 years ago
Read 2 more answers
A polygon is shown what is the measure of U
Elan Coil [88]

Answer:

120

Step-by-step explanation:

That's a guess, but it's the most logical one.

6 0
3 years ago
Aidan has 20 ft of fence with which to build a rectangular dog run. What is the maximum area he can enclose? Enter your answer i
irina1246 [14]
<h2>Maximum area is 25 m²</h2>

Explanation:

Let L be the length and W be the width.

Aidan has 20 ft of fence with which to build a rectangular dog run.

         Fencing = 2L + 2W  = 20 ft

                     L + W = 10

                      W = 10 - L

We need to find what is the largest area that can be enclosed.

     Area = Length x Width

      A = LW

       A = L x (10-L) = 10 L - L²

For maximum area differential is zero

So we have

      dA = 0

      10 - 2 L = 0

        L = 5 m

      W = 10 - 5 = 5 m

Area = 5 x 5 = 25 m²

Maximum area is 25 m²

7 0
3 years ago
Will give the brainliest!!!
DaniilM [7]

the answer should be 320.4

8 0
3 years ago
Read 2 more answers
Other questions:
  • Nathan correctly answered 17 of the 20 questions on the test. What percent of the question did Nathan answer correctly?
    10·2 answers
  • 7 times as much as the sum of 1/3 and 4/5
    15·2 answers
  • In which quadrant are the x coordinates and the y coordinants of a piont both negitive
    7·2 answers
  • What is the solution to the equation <br><img src="https://tex.z-dn.net/?f=%20-%20%20%5Csqrt%7Bx%20%2B%2010%7D%20%3D%207" id="Te
    15·1 answer
  • (a) Estimate the number of boys at Hillview.
    9·1 answer
  • Every day Katie looks at the seashells on the beach.she has 28 shells in her collection.katie finds 12 more shells each day
    12·1 answer
  • Angela is making bags of trail mix for hikers Club she will ues21 ounces walnuts 11.2 ounces of almonds and 17.3 ounces of cashe
    7·1 answer
  • List the next three terms in the following sequence:
    13·1 answer
  • What is perpendicular to x=5
    15·1 answer
  • Whai si (3x+5) (x-2)
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!