Question

The microwave tray gives 12 turns per minute
If you have given 42 laps how long it has been on?

Answer 1

(42) ---------------- (12)
(X) ------------- (1 minute)

(42 * 1) / 12 =
42/12 =
= 3.5 minutes
_______________________________________________
Answer: 3.5 minutes takes the microwave to be on

Answer 2

12---------------1 min
42---------------?

=42*1/12
=42/12
=3.5 min
The microwave tray takes 3.5 min

hope this helps you