Question

The temperature of a substance decreases at the rate of 2degree c per 10 minutes . the temperature of the substance at 5 o'clock was 10degreec . at what time will the temperature of the substance be 4degree c below zero ? answer

Answer 1

Answer:

6 - 10 O clock

Step-by-step explanation:

2 degree per 10 min

in one hr drop by 12 degree

at 5 Oclock : temp 10 dC

new temp in question is -4dC

difference  or drop = 14 degree

time required for this drop = 14/2 x10 = 70  min

so time will be 6 hrs 10 min