Question

The counter on a tape recorder registers 520 after the recorder has been running for 20 minutes. What would the counter register after half an hour?

Answer 1

multiply by 3 and divide by 1/2

Answer 2

520*3=1560
20*3=60

Answer 3

30 mins = 780

Answer 4

Okay, so the counter is 520....after the register has been running for 20 minutes.

So what would the counter be for 1 minute?

\[520\div20=26\]

That means the counter would be at 26, for 1 minute.

If the counter is at 26, for 1 minute,
what would the counter be, for 30 minutes?

\[26\times30=780\]

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You could try posting questions like this in the Math section.
But this one was really easy, you see.