Answer:
5 11/12
Step-by-step explanation:
2 4/16 = 2 1/4
2 1/4 + 3 2/3 = 9/4 + 11/3
27/12 + 44/12 = 71/12 = 5 11/12
Step-by-step explanation:
Let the required number be x.
According to the given information:

Hence the required number is 31.
Answer:
After 15 minutes, the temperature of both the furnaces will be same.
Step-by-step explanation:
Let
be the minutes when the temperature of both becomes same.
Now, as per question:
Temperature of the furnace after
minutes that is cooling at the rate of 15 degree per minute is given as:

Temperature of the furnace after
minutes that is heating at the rate of 5 degree per minute is given as:

Now, equating both the temperatures, we get

Therefore, after 15 minutes, the temperature of both the furnaces will be same.