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zlopas [31]
3 years ago
9

A scale on a map shows that 3 centimeters represents 10 kilometers. What number of centimeters on the map represents an actual d

istance of 25 kilometers?
Mathematics
2 answers:
ExtremeBDS [4]3 years ago
7 0
Scale: 3cm=10km
3:10 or 3/10

3cm/10km=x/25km

x=25x3/10
=7.5cm

7.5cm represents an actual distance of 25km.
Ludmilka [50]3 years ago
3 0

Answer:6.5 centimeters

Step-by-step explanation:10 kilo + 10 kilo + 5 kilo

Should give you 6.5 centimeters if 10 is 3 centimeters

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Interesting problem.

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A three digit palindrome must be made up of two distinct digits only, one for the first and last digits, and one for the middle, for example, 424, or 515, etc.


For a number to be divisible by 9, the sum of the digits must add up to a multiple of 9, such as 0, 9, 18, 27, etc.


We can now form a table of the possible 3-digit palindromes divisible by 9, starting with the first/last digits (=A), and finding the middle digit (=B).  The number is therefore represented by the pattern ABA.

For example, when A=1, we have the number 1B1.  For the number to be divisible by 9, B=7 so that sum=1+7+1=9, which is divisible by 9.

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Here's a list of the numbers

A   B   number

1    7    171

2   5    252

3   3    333

4   1     414

5   8    585

6   6    666

7   4    747

8   2   828

9   0   909

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