Question

The temperature at 12 noon at a certain place was 20° above zero. If it decreases at the rate of 3° per hour at what time it would be 12° below zero? (i) 12 mid night (ii) 12 noon (iii) 10 am (iv) 10 pm

Answer 1

Answer:

10pm

Step-by-step explanation:

At 12 noon the temperature is 20°

3° reduces for each hour

At -12° the time is ?

Difference of temperatures is 20-(-12) = 32

-32/3 = approx 10 hours

So the time will be 10 pm

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