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The temperature at 12 noon was 10^@ C ab...

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

Text Solution

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a) 12:00pm=`10^0C`
rate=`-2^0`c/h
from 12pm to 12am there are 12 hours.
time at which `-8^0C`
`10^0c`-2x=`-8^0C`
x=9
after 9hrs from noon=`-8^0`
from 9AM to 12AM=10-24=`-14^0`.
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