The temperature at 2 PM at a place was 15 degree above zero. If it decreases at the rate of 4 degree per hour. At what time it would be 17 degree below 0.
8 PM
10 PM
12 midnight
6 PM
Answers
Answer:
At 12 noon, the temperature = 10° C above zero
The temperature is decreasing at 2° C per hour
8° C below zero = - 8° C
So, total fall in temperature from 10° C to 0° C and from 0° C to - 8° C = 18° C
Since the temperature falls 2° C in every one hour.
Therefore, to decrease 18° C, time taken = 18/2
= 9 hours
Present time is 12 noon so, the time when the temperature is - 8° C
= 12 noon + 9 hours
So, The time at which the temperature will be - 8° C = 9 PM
At 9 PM, the temperature is - 8° C, the temperature at 12 midnight will be =
(- 8° C) + (- 2° C × 3 hours)
= (- 8° C) + (- 6° C)
= - 14° C
So, at 12 midnight the temperature will be - 14° C.
Answer.
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Answer:
-14 degree celcius
Step-by-step explanation:
temperature at 12 noon = 10 degree celcius
at 1=10 - 2 =8 degree celcius
at 2=8-2=6 degree celcius
at 3=6-2=4 degree celcius
at 4=4-2= 2 degree celcius
at 5=2-2=0 degree celcius
at 6=0-2=-2 degree celcius
at 7=-2-2=-4 degree celcius
at 8=-4-2=-6 degree celcius
at9=-6-2=-8 degree celcius
at 10=-8-2=-10 degree celcius
at 11=-10-2=-12 degree celcius
at 12=-12-2=-14 degree celcius
So, the time when temperature would be 8 degree celcius below zero= 9PM,the temperature at midnight (12AM) would be -14 degree celcius.
Thank u , hope it helps u all
izvoru47 and 10 more users found this answer helpful
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