MATHEMATICS MIDDLE SCHOOL

it takes 10 workers 5 days to complete a road repair when working 2 hours a day. working at the same pax’s how many days will it take 2 people working 5 hours a day to finish it?

Answers

Answer 1
Answer:

It takes 10 workers 5 days to complete a road repair when working 2 hours a day.

So, this becomes : 2*5*10=100 man hours required to finish the work.

Given is, if 2 people work for 5 hours a day, then let the number of days to finish the road be = d

So, total man hours = 2*5*d=10d

Now, 10d=100 or d=10

Hence, it will take 10 days for 2 people working 5 hours daily, to complete the work.
Answer 2
Answer:

It will take 10 days for 2 people working 5 hours a day to finish the road repair.

Further Explanation:

From the question;

10 workers can finish road repair in 5 days working 2 hours a day

We need to find;

The number of days required to complete the road repair by 2 workers  working 5 hours a day.

Assuming the number of days required to complete the work is x

Number of working hours of 10 people is 10 hours ( 2 hours a day for 5 days)

Number of working hours of 2 people is 5x hours (5 hours a day for x days)

Note that; the number of workers or people is inversely related to the number of working hours.

Therefore;

Product of number of people and working hours or work done is a constant

Thus;

10 × 10 =  2 × 5x

100 = 10 x

x = 10

Therefore;

2 workers working 5 hours a day will require 10 days to complete the road repair.

Keywords: rate of work, number of hours, number of days required to complete the job.

Learn more about;

Level: Middle school

Subject: Mathematics

Topic: Rate of work

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A drinking glass is shaped like a cylinder with a height of 5 in. and a diameter of 3 in. Maeva adds 25 spherical pieces of ice to the glass. The pieces of ice each have a diameter of 1.1 in.How many cubic inches of water can Maeva add to fill the glass to the rim? Use 3.14 to approximate pi and round your answer to one decimal place.

Answers

first find volume of glass
find volume of ice
subtract


cylinder area=height times are of base

height=5
area of base=circle=pi times radius^2
diameter=2radius
diameter/2=radius
3/2=radius=1.5


pi=aprox 3.14
3.14 times 1.5^2=7.065
7.065 times 5=35.325=volume of glass

25 spereical ice
volume of shqere=4/3 times pi timers r^3
diameter/2=r
1.1/2=0.55
4/3 times 3.14 times 0.55^3=0.696557=1 ice
multiply by 25
17.4139
subtract
35.325-17.4139=17.9111
round to one decimal place
17.9

the answer is 17.9 cubic inches or
17.9 in^3

What is a comparison of numbers or variables that can be written in fraction form

Answers

i believe 
4 and 6
4/1 and 6/1

Devon studied the composite figure.(Picture 1)
He believed the surface area, in square units, could be found by simplifying the expression
(Picture 2)
What error did Devon make?

A. He used 26 instead of 24 as the slant height of one set of lateral faces.
B. He omitted the rectangle where the upper and lower solids join together.
C. He included the 34 by 20 base of the figure.
D. He believed the upper part of the figure was a pyramid instead of a prism.

Answers

If we look at his calculations
2((9)(20) is the front an back rectangle
2((9)(34)) is the side rectangles
(34)(20) is the bottom
2(1/2(20(24)) is te front and top triangles
and the last one assumes that they are triangles which is incorrect

answer is D

Answer:

D

Step-by-step explanation:

What is 32,904+m=61,381

Answers

then  32,904+?=61,381
  you need to do 61,381-32,904=28,477
then is 32,904+28,477 = 61,381 =)
32,904 + m = 61,381

61,381 - 32,904 = m

m = 28,477

What is the volume of the following rectangular prism?

Answers

Answer:  The required volume of the given rectangular prism is 14(2)/(3)~\textup{cubic units}.

Step-by-step explanation:  We are given to find the volume of the rectangular prism shown in the figure.

We know that

the VOLUME of a rectangular prism with base area b sq. units and height h units is given by

A=bh.

For the given rectangular prism, we have

b=7(1)/(3)=(22)/(3),~~h=2.

Therefore, the VOLUME of the given rectangular prism is

A=bh=(22)/(3)*2=(44)/(3)=14(2)/(3).

Thus, the required volume of the given rectangular prism is 14(2)/(3)~\textup{cubic units}.
14 2/3

How:

7 1/3 times 2 is 14 2/3

What is $0.1369 rounded to the nearest cent

Answers

Ok, what is $0.1369 rounded to the nearest cent? 

100 cents make a dollar which means the most possible cents not making a dollar is 99 cents

So that means you leave the first two decimals alone and focus on the last two.

What is 69 closer to? 70 or 60? Well, its larger than 65 which is the halfway point so its closer to 70

Is 70 closer to 0 or 100? Well, since 70 is past the halfway point which is 50, its closer to 100.

Think of 3 as 0 and the next number up which is 4 as 100, well, since 70 is closer to 100 than 0, its closer to 4.

So That means that 0.1369 rounded to the nearest cent is $0.14

Your answer rounded is $0.14
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