Question

thethe temperature at 12 noon was 10 degree Celsius about zero if it decreases at the rate of 2 degree Celsius per hour until midnight at which time today temperature of b.Ed degree Celsius below zero what would be the temperature at midnight​

Answer 1

Answer:

Since the temperature falls 2° C in every one hour. So, at 12 midnight the temperature will be – 14° C.

Hope it helps U dear foIIow @HarleyQuinn

Answer 2

QuesTion

• 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 midnight ?

AnsweR

• Time, when temperature will be 8°C below zero = 9 PM
• Temperature at midnight = (-14)°C

Step By Step Explanation

Given

• Temperature at 12 noon = 10°C
• Rate of decrease in temperature = 2°C per hour

To Find

• At what time would the temperature be 8°C below zero?
• Temperature at midnight?

Solution

Temperature at 12 noon = 10°C above zero

Rate of decrease in temperature = 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 hour .

Therefore, to decrease 18°C , time taken =

$\frac{18}{2} \: = \: 9 \: hours$

Present time is 12 noon,

So,

The time at which temperature will be -8°C = 9PM

If the temperature at 9 PM be (-8)°C, then the temperature at midnight be,

( -8°C ) + ( -2°C x 3 hours )

= (-14)°C

[we multiply it by 3 hours because difference between 12 noon and 9PM is 3 hours]

So, at 12 midnight the temperature be (-14)°C.