Question

The independence day celebration in the school got over at 10:15a.m. if the programme was for 1hour 30minutes at what time did it begin?

Answer 1

Hint: Subtracting the time duration of the programme continued from the time the programme got over.

Complete step-by-step answer:
Time at which programme started can be calculated as :
\[
  10:15 - 1{\text{hour}}30\min \\
   = 10{\text{hour}}15\min - 1{\text{hour}}30\min \\
   = 9{\text{hour}}15\min - 30\min \\
   = 9{\text{hour}}15\min - 15\min - 15\min \\
   = 9{\text{hour}} - 15\min \\
   = 8{\text{hour}}15\min \\
   = 8:45{\text{A}}{\text{.M}}{\text{.}} \\
 \]

Note: This word problem is simply based on subtraction method in which we took the time at which programme got over in the form of hours and minutes and from this time we subtracted the time duration the programme was continued and finally got the result that the programme was started at 8.45a.m.