Question

In a freezer, the temperature falls by 2°C every 5 minutes. In how much time, water kept at 36°C will freeze into ice?

Answer 1

Answer:

Step-by-step explanation:

In the freezer ice will form from water at 0 degree C Since the water is at 36 degree C, so the temp. required to fall will be 36 degree C - 0 degree C = 36 degree.

In the freezer temp falls  2 degree C at every 5 mins.

The temp. to fall 2 degree time taken = 5 mins.

Then the temp. to fall 36 degree the time taken = 5 / 2 x 36 mins = 5 x 18 mins - 90 mins = 1 hr 30 mins.

Ans: 1 hr. 30 mins.