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3 years ago

A machine packs 2/5 of a box every 1/2 minute. What is the number of boxes per minute packed? Why?

Mathematics

1 answer:

Alla [95]3 years ago

4 0

If it is packed 2/5 in 1/2 minutes

1 minute =2/5*2=4/5 or 0.8 boxes/min

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A cylinder has a volume of 360 in^3. If the height and radius are multiplied by 2.5, what will the resulting volume be?

4vir4ik [10]

$\bf \textit{volume of a cylinder}\\\\
V=\pi r^2 h\quad 
\begin{cases}
r=radius\\
h=height\\
-----\\
r=2.5r\\
h=2.5h
\end{cases}\implies V=\pi (2.5r)^2(2.5h)
\\\\\\
V=\pi \cdot 2.5^2\cdot r^2\cdot 2.5h\implies V=(2.5^2\cdot 2.5)\pi r^2 h
\\\\\\
V=15.625\pi r^2h\impliedby \textit{15.625 of the original}
\\\\\\
\textit{if the original was 360}\qquad 15.265\cdot 360$

5 0

3 years ago

2. The length of a rectangle exceeds its breadth by 5m.If the perimeter of the rectangle is 74m,find the length and breadth of t

AURORKA [14]

Step-by-step explanation:

length = breadth + 5

the perimeter is a rectangle is

2×length + 2×breadth

in our case

2×length + 2×breadth = 74

so, we use the first equation in the second equation :

2×(breadth + 5) + 2×breadth = 74

2× breadth + 10 + 2× breadth = 74

4×breadth = 64

breadth = 16 m

length = breadth + 5 = 16 + 5 = 21 m

7 0

2 years ago

Please helppppppp meeeeee

DENIUS [597]

Step-by-step explanation:

Given

3x ( x - 1 ) + 2 = - x²

3x² - 3x + 2 = -x²

3x² + x² - 3x + 2 = 0

4x² - 3x + 2 =0

4 0

3 years ago

Which inequality is true if p=3.4

Katyanochek1 [597]

Answer:

F.3p < 10.2

G.13.6 ≤ 3.9p

H.5p > 17.1

J.8.5

4 0

3 years ago

What is the area of a circle with a radius of 13 millimeters? (Use 3.14 for Pi.)

pav-90 [236]

Step-by-step explanation:

Given

Radius (r) = 13 mm

Area of the circle

= πr²

= 3.14 * 13 *13

= 530.66 mm²

Hope it will help :)

5 0

3 years ago