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kolbaska11 [484]
3 years ago
7

I need the answer please and can u answer my recent to.

Mathematics
1 answer:
ale4655 [162]3 years ago
3 0

Answer:

30 hours.

Step-by-step explanation:

Richard can build 15 snowballs in 1 hour

But 2 snowballs melt every 15 minutes

In 1 hour, the number of snowballs that will have melted is:

\frac{60}{15} × 2 = 8

The number of snowballs that will have remained = 15 - 8 = 7

So 7 snowballs will have remained in 1 hour

For 210 snowballs to have remained, it will take:

\frac{210}{7} × 1 = 30 hours.

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