Two similar blocks have corresponding edges of length 10cm and 20cm. find the ratio of their masses​

Which of the following equations is equivalent to x/3-6/x=1

You can ride your bike around your block 6 times and the whole neighborhood 5 times in 16 minutes. you can ride your bike around your block 3 times and the whole neighborhood 10 times in 23 minutes. how long does it take you to ride around the neighborhood?

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