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3 years ago

9

There are 240 coins in a jar, all dimes and quarters. The value of the coins in the jar is $27.60. There are nine times as many

dimes as there are quarters. How many dimes (d ) are in the jar?

1 answer:

SashulF [63]3 years ago

8 0

I believe it is 28 dimes
.25 × 30 = 7.50
.10 × 190 = 19
19 + 7.50 = 26.50
Then, you add 4 more quarters which is 27.50 and the 28 dime makes it 27.60

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Step-by-step explanation:

<u><em>The question in English is</em></u>

I'm going to buy a curtain rod. Since I live on a twelfth floor, I'm interested in knowing the maximum length I can put in the elevator.

So I take out my pocket tape measure, which only measures up to a meter and I measure the floor which turns out to be a square of 1m x 1m, but for the height it doesn't give.

However, there's a sticker on the lift box that says it has a capacity of 2,500 litres.

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step 1

Find the height of the elevator

we know that

The elevator has a capacity of 2,500 litres.

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The volume of the elevator is given by

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h is the height of the elevator

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step 2

Find the diagonal of the base of the elevator

Let

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step 3

Find the diagonal of the rectangular prism (elevator)

Let

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h ----> height of the elevator

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$D^2=d^2+h^2$

substitute

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