Question

.The temperature at 12 noon was 8°C above zero. If it decreases at the rate of 3°C per hour until midnight: Then at what time would the temperature be 10°C below zero?

Answer 1

Answer:

So, the temperature at 6 in the evening i.e. 6 pm will be -10 degree centigrade.

Step-by-step explanation:

Given: Temperature at 12 noon: 8 degree centigrade

            Decreasing rate: 3 degree centigrade/hr.

To find: Time at which temperature will be -10 degree centigrade.

Solution:

Time taken to reach -10 degree centigrade=difference in given temperatures/decreasing rate

=(8-(-10))/3= 18/3= 6 hours.

So, the temperature at 6 in the evening i.e. 6 pm will be -10 degree centigrade.