Question

the temperature of tea during making period is 100°C. If the tea loses 10°C temperature every minute after making, how much time does it take to reach 30°C​

Answer 1

Answer:

Seven minutes.

Step-by-step explanation:

Decease temperature gradually and count the time.

Answer 2

Answer:

7 min

Step-by-step explanation:

Temp = 100°

Temp to reach = 30°

Temp lost per min = 10°

For 100 to reach 30 => 70°

so, 70°/10° = 7 min