Question

pls answer..........​

Answer 1

Answer:

RATE OF lowering of temp per hour=5 celsius

at the end of 12 hr total temp lowered=12*5

                                                              =60 celsius

temp of room after 12 hr ater the beginning of proess=40-60

                                                                                        =-20celsius

Step-by-step explanation:

Answer 2

Answer:

12×5=60and

60-49=20ans