Question

the temperature of a mixture decreases at the rate of 1°C per 30 minutes the temperature of the mixture at 3 o'clock was 5°c (A) at what time will the temperature will be 3°C below zero (B) what will be the temperature of the mixture at 6 o'clock

Answer 1

A). Change in temp= 5-(-3)

=8

Time=8*30min

=8*30/60 hr =. 4hr = 4:00

B) time=6-3=3hrs

In 1/2 an hour temp drops= 1’C

In 3 hours temp drops= 3*2=6’C

Temp at 6 o clock=. 5-6= -1’C

Answers=

A) 4:00

B) -1’C