Question

The temperature of 12 noon was 10°c above zero if it decreases at the rate at 2°c per hour until mid night at what line would the temperature be 8°c below zero

Answer 1

Answer:

9 hrs

Step-by-step explanation:

Temperature at 12 noon = 10 degree Celsius

10 - x = -8

- x = -8 - 10

-x = -18

x = 18 degrees

decrease per hour = 2 degree Celsius

total celsius of decrease( till -8 degree celsius)=18 degree Celsius

total hrs of decrease = total celsius of decrease/ decrease per hour

= 18/2

= 9 hours

Ans:  after 9 hours it wold be below zero. ei. 12 +9 = 2100 hrs or 9'o clock