Answer:
19 minutes
Explanation:
We should know that: 1 minute = 60 seconds
∵ It takes Andrew 720 seconds to take a shower
converting to minutes ⇒∴ 720 seconds = 720/60 = 12 minutes
He spends an additional 420 seconds eating breakfast.
converting to minutes ⇒∴ 420 seconds = 420/60 = 7 minutes
So, The time taken for a shower and eat breakfast = 12 + 7 = 19 minutes