MATHEMATICS MIDDLE SCHOOL

it takes 36 minutes for 7 people to paint 4 walls.How many minutes does it take 9 people to paint 7 walls

Answers

Answer 1
Answer:

Answer:

The time required by 9 people to paint 7 walls is 49 minutes

Step-by-step explanation:

Given as :

The number of people (p1) = 7

The work done by them (w1) = 4

The time taken (T1) = 36 minutes

Again :

The number of people (p2) = 9

The work done by them (w2) = 7

Let the time Time taken (T2) = T2

So, we know as :

(MEN * TIME)/(WORK)  = Constant

SO, (P1 * T1)/(W1)  = (P2 * T2)/(W2)

Or, (7 * 36 min)/(4)  = (9 * T2)/(7)

Or, (252)/(4)  = (9 T2)/(7)

Or , (252 * 7)/(9* 4) = T2

∴  T2 = 49 minutes

Hence The time required by 9 people to paint 7 walls is 49 minutesAnswer

Related Questions

Enter the unknown value that makes this statement true : ? Is 40 percent of 60
What number is 100 more than 562
Can someone help me for this question ?? Please
A parallelogram has one angle that measures 76°. What are the measures of the other three angles in the parallelogram?
mrs.bowen's homeroom is creating a web page for their schools intranet site. they need to reduce a scanned photograph so ot is 720 pixels by 320 pixels. of the scanned photograph is 1,080 pixels by 480 pixels, what is the scale factor of the dilation

Paulina reads an average of 20 pages each day. She has 6 days to read 10^2 pages. Will she finish her reading in 6 days? Explain

Answers

10^2 = 10*10 =100

she can read 20 pages per day, so she can read 120 pages in 6 day.
in 5 days she will read 100 pages.

yes, she will finish reading in 6 days...

The base of a ladder is placed 5 feet away from a 13 foot tall wall. What is the minimum length ladder needed to reach the top of the wall (rounded to the nearest foot)?

Answers

Answer:

The answer is 14 acually

Step-by-step explanation:
What you have described is a right angled triangle with a hypotenuse of length 13 feet and a base of 5 feet. To find the length of the remaining side (i.e. how far up the side of the building the ladder reaches) you have to use Pythagora's Theorem. This states that the hypotenuse squared is equal to the sum of the squares of the other two sides. So your answer should be 13^2=5^2+(how far up the side of the building the ladder reaches)^2, which becomes 169=25+(other side)^2, =169-25=(other side)^2 = 144= (other side)^2, so the height that the ladder reaches up the side of the building equals 12 feet.

The math club needs to raise more than $552.50 for a trip, the club raised 12% of the funds, what inequality shows how much money each of the 7 club members need to raise if each member raises the same amount?

Answers

ok so they raised 12%
12%=12/100=0.12
12% of 552.5=.12 times 552.5=66.3 was raised
552.5-66.3=486.2

divide by 7
486.2/7=69.457 about 69.46

each member must raise at least 69.46

True or false
A trapezium is a parallelogram

Answers

true
There is some disagreement whether parallelograms, which have two pairs of parallel sides, should be regarded as trapezoids. Some define a trapezoid as a quadrilateral having only one pair of parallel sides (the exclusive definition), thereby excluding parallelograms.
No trapezoid is not a parallelogram.

Molly buys 12 rolls of wallpaper for £111.00.
How much is 1 roll of wallpaper?

Answers

Answer: £9.25


111.00/12=9.25

Answer it would be 9.25

111 divided by 12 = 9.25 and anyone can use a cowculater to find that out

What is four sixths minus five sixths

Answers

4-5 = -1 
4/6 - 5/6 = -1/6
1 sixths would be the awnser you just take away four from five that will give you one so you just need to add the sixths part
Other Questions
300 miles is equivalent to how many yd.
Lori is running a marathon, which is 26.2 miles long. So far, she has run one-tenth of the marathon. How far has Lori run? (from the book)
Jane and Sue decide to make friendship bracelets for all their classmates. Jane brings 4.5 feet of string, and together they have 10 feet of string. How many feet of string did Sue bring
Stacie paid $13.25 for new earphones. The price she paid included a sales tax of 6%.What was the price of the earphones before the tax was added? A. $12.46 B. $12.50 C. $13.19 D. $14.05