Respuesta :

 30 donuts in 60 minutes
 90 donuts           ?

90 x 60 / 30 = 180 minutes

answer
180 minutes


WaterG
It would take him 180 mins or 3 hours.

This is because it takes him for 2 minutes to make 1 donut.

So 90 x 2 = 180 minutes or 3 hours.
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