All categories

3 years ago

36 boys complete a school task in 4 hours. How many boys would be required to complete the same task in 2¼ hours?

Mathematics

1 answer:

vova2212 [387]3 years ago

8 0

Answer:

Step-by-step explanation:

If 36 boys can conplete a task in 4 hours, then 19.35 boys could do it in 2 and a fourth hours.

You can set up an equation

A fourth of an hour is 15 minutes, so,

36 is to 4 as x is to 2.15, or,

36=4 as X=2.15

Multiply 2.15 by 36 (77.4)

77.4 divided by 4= 19.35.

Of course, you cannot have 19.35 boys, so there must be 20.

Hope this helps!

You might be interested in

An internet service provider is implementing a new program based on the number of connected devices in each household. Currently

oee [108]

Cost of the current plan: $175
Number of devices: x
Cost of the new plan: $94+($4.50/device)x

Cost of the new plan is less than the current plan:
$94+($4.50/device)x<$175

Solving for x:
$94+($4.50/device)x-$94<$175-$94
($4.50/device)x<$81
(device/$4.50)($4.50/device)x<(device/$4.50)($81)
x<18 devices

Please, see the attached file.
Thanks.

8 0

3 years ago

Read 2 more answers

PLEASE HELP!!!! Geometry is so hard and this is due tonight :(

omeli [17]

Cos(68)=z/24
Z=24cos(68)
Find the answer by the calculator

Second question,
Cos(x)=16/34
X=cos^-1(16/34)
Use calculator

7 0

3 years ago

A vineyard has 145 acres of Chardonnay grapes. A particular soil supplement requires 5.50 grams for every square meter of vineya

SashulF [63]

3230 kilograms of the soil supplement are required for the entire vineyard

<h3>Further explanation</h3>

Some units that need to be recalled are as follows :

1 km = 1000 m = 10³ m

1 km² = 1000000 m² = 10⁶ m

1 km² = 247 acres

1 kg = 1000 g

Let's tackle the problem now!

A vineyard has 145 acres of Chardonnay grapes.

$145 ~ acres = \frac{145}{247} \times 1 ~ km^2$

$145 ~ acres = \frac{145}{247} ~ km^2$

$\boxed {145 ~ acres \approx 0.587 ~ km^2}$

A particular soil supplement requires 5.50 grams for every square meter of vineyard.

$1 ~ m^2 \rightarrow 5.50 ~ gram$

$1 ~ km^2 = 10^6 ~ m^2 \rightarrow 5.50 \times 10^6 ~ gram$

$1 ~ km^2 \rightarrow 5.50 \times 10^6 \times 10^{-3} ~ kg$

$\boxed {1 ~ km^2 \rightarrow 5.50 \times 10^3 ~ kg}$

$145 ~ acres = \frac{145}{247} ~ km^2 \rightarrow \frac{145}{247} \times 5.50 \times 10^3 ~ kg$

$145 ~ acres \rightarrow \frac{797500}{247} ~ kg$

$145 ~ acres \rightarrow 3230 ~ kg$

<h2>Conclusion :</h2>

It required 797500/247 kg ≈ 3230 kg of the soil supplement for the entire vineyard

<h3>Learn more</h3>

Conversion Factor of Speed : brainly.com/question/11224343
The Distance of the Cheetah : brainly.com/question/7171227
The Speed of The Car : brainly.com/question/568302

<h3>Answer details</h3>

Grade: Middle School

Subject: Mathematics

Chapter: Arithmetic

Keywords: Addition , Subtraction , Multiplication , Division , Number , Expression , Time , Duration , Write

7 0

4 years ago

Read 2 more answers

forty children from an after school club went to the matinee. this is 25% of the children at the club. how many children are in

Aleks [24]

Number of children from an after school that went to the martinee = 40
Percentage of children from an after school that went to the martinee = 25%
Let us assume the number of children in the club = x
Then
25% * x = 40
(25x/100) = 40
x/4 = 40
x = 40 * 4
= 160
So the total number of children in the club is 160. I hope the procedure is clear enough for you to understand. you can always use this method for solving similar problems without requiring any help from outside.

6 0

3 years ago

Read 2 more answers

How do I find the area of a triangle and a circle??

Salsk061 [2.6K]

Answer:

Area of triangle =1/2×base×height

Area of circle = pie × radius ^2

3 0

3 years ago

36 boys complete a school task in 4 hours. How many boys would be required to complete the same task in 2¼ hours?​

36 boys complete a school task in 4 hours. How many boys would be required to complete the same task in 2¼ hours?