Question

Water in a lake is converted into ice at 0°C when the temperature of the atmosphere is − 10°C. If it takes 7 hours to form ice of thickness of 1cm. Then the time required for the thickness of ice to increase from 1 cm to 2 cm, will be : 

(a) less than 7 hour 

(b) more than 14 hour 

(c) 7 hour 

(d) 14 hour 

Answer 1

Correct option (b) more than 14 hour

Explanation:

Here, t₁ = 7 hour, x₂ = 2 cm and x₁ = 1 cm. 

When the ice is grown in lake, then initial time for ice formation

The final time for ice formation is