Which of the following statements is correct?

Question

An electric tea kettle has two heating coils. When one of coils is switched on, the kettle begins to boil in 6 minutes. When the other is switched on the kettle begin to boil in 8 minutes. It boil the coils are switched on simultaneously and connected in parallel then the kettle will begin to boil in.

(1) 14 minutes

(2) 205. 7 seconds

(3) 7/24 minutes

(4) 48 minutes

Answer 1

(2) 205. 7 seconds

Let t be the time the kettle take to begin boiling when they are connected in parallel.