question_answer

Temperature of a place at 12:00 noon was \[+5{}^\circ C\]. Temperature increased by \[3{}^\circ C\] in first hour and decreased by \[1{}^\circ C\] in the second hour. What was the temperature at 2:00 p.m.?

Answer:

Given, initial temperature at 12: 00 noon was\[+5{}^\circ C\] . Since, the temperature increased by \[3{}^\circ C\] in first hour. \[\therefore \] Temperature at 1: 00 p.m. \[=5{}^\circ C+3{}^\circ C=8{}^\circ C\] Also, the temperature decreased by \[1{}^\circ C\]in the second hour \[\therefore \] Temperature at 2:00 p.m. \[=8{}^\circ C-1{}^\circ C=7{}^\circ C\] Hence, the temperature at 2:00 p.m. is \[7\text{ }{}^\circ C\].