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4 years ago

I don't understand this, please explain how.

Mathematics

1 answer:

masha68 [24]4 years ago

5 0

First find the volume of the pool. To do so, multiply the length, times the width, times the height. In this case, it would be 12*15*5 and you get 900 cubic meters.
If the pool is being filled with 36 cubic meters of water per hour, you divide 900 by 36. You get 25 hours.
To check your work, multiply 25 hours and 36 cubic meters of water. You get 900 cubic meters, which is the area of the pool meaning it is full.

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Answer:

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When making a book cover, Anwar adds an additional 20 square inches to the surface area to allow for overlap. How many square in

e-lub [12.9K]

Answer:

234 square inches

Step-by-step explanation:

We are given that

Length of book, l=11 in

Width of book, w=8 in

Height of book, h=1in

Additional area required to overlap=20 square inches

We have to find how many square inches of paper to make cover of one book.

We know that surface area of cuboid

$S=2(lb+bh+hl)$

Using the formula

Surface area of book

$S=2(11\times 8+8\times 1+1\times 11)$

$S=214 in^2$

Total paper used to make cover of one book

=Surface area of book +additional surface area

= $214+20$

$=234in^2$

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3 years ago

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2 years ago

42 dollars is 72% of what number

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3 years ago

Find a:c and a:b:c of a:b =4:5, b:c=3;5<br>pls ans with explanation

Lynna [10]

Here's the solution,

a : b = 4 : 5

b : c = 3 : 5

now, we can combine the ratios if the value of b is equal in both of them, and we have to make sure it's the minimum value since we have to obtain it in the simplest form, so let's take the L.C.M of b in both proportions .

L.C.M of b in both ratios is 15

ratio 1.)

a : b = 4 : 5
a : b = 12 : 15

( just multiplied both numbers by 3 to make b = 15 )

ratio 2.)

b : c = 3 : 5
b : c = 15 : 25

( just multiplied both numbers by 5 to make b = 15)

now, simply combine the equations to get,

a : b : c = 12 : 15 : 25

and hence,

a : c = 12 : 25

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3 years ago