Respuesta :

12Av13
1 min = [tex] \frac{1}{60} \: hour[/tex]

Now,

Replacing m with [tex] \frac{1}{60} h[/tex]

[tex] \frac{20mm}{m} \\ \frac{20mm}{ \frac{1}{60}h } \\ \frac{20mm \times 60}{1h} \\ \frac{1200mm}{h} [/tex]

Here it is,
20mm/m = 1200 mm/h

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