Question

d) The temperature in a city at 7 a.m.is -8°C. It increases at the rate of 3°C per hour until 5 pm
i. What would be the temperature at 1 p.m.?
ii. At what time will the temperature be 1°C?
iii. What is the difference in temperatures between 11 a.m. and 4 p.m.?​

Answer 1

Answer:

i. 7C

ii. 11 am

iii.15C

Step-by-step explanation:

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Answer 2

Step-by-step explanation:

given: temp. at 7am is -8°C

it increases at 3 x 1 hrs

solution:1. time duration between 7 am and 1 pm is 6 hrs

therefore temp increased will be 3x6hrs= 18°C

therefore the temp. at 1pm will be= -8°C + 18°C = 10°C

2. to be 1°C the temp increased should be just one more than 8 i.e. 9

now on dividing 9 by 3(as temp is increasing at the rate of 3°C per 1 hr)

time at which the temp will be 1°C is 3 hrs more than 7am that is at 10am

3.since the temp us increasing at the rate of 3°Cper hour ...the temp increased bw the time duration of 11am n 4 pm will be= 3°C x 5hrs= 15°C

therefore the difference bw the temp. at 11am n 4pm will be 15°C