Question

The temperature at 12 noon was 10oC above zero. If it decreases at the rate of 2oC per hour until midnight, at what time would the temperature be 8°C below zero? What would be the temperature at mid-night?​

Answer 1

Answer:

Let noon be time =0,then the temperature in degree Celsius at t hr .would be :

T=10-2t

now

to find when the temperature is 8°c below zero

T=-8

10-2t =-8

T=9

THUS the temperature is 8 degree below 0 at 9 p.m.

to find the temperature at midnight use t =12.00

T=10-2(12)=10-24=-14

thus ,the temperature of midnight is 14°c below zero