Question

Q.5 Temperature of a place at 8:00 pm is -2 degree Celsius. After 1-hour temperature decreases by 1 degree Celsius. In the next hour temperature decreases by 2 degree Celsius. What is the temperature of the place at 9:00 pm? (a) -1 degree Celsius (b) 2 degree Celsius (c) 1 degree Celsius (d) -3 degree Celsius​

Answer 1

Answer:

Let noon be time t = 0 hr.,

then the temperature T in degrees Celsius at t hr. would be:

T = 10 - 2t

Now,

To find when the temperature is 8°C below zero,

T = -8

10 - 2t = -8

2t = 18

t = 9

Thus, the temperature is 8°C below zero at 9:00 pm.

To find the temperature at midnight,

use t = 12:00

T = 10 - 2(12) = 10 - 24 = -14

Thus, the temperature at midnight is 14∘C below zero.

Hope this helps you...,

Step-by-step explanation:

Answer 2

Answer:

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