Question

The drama started at 7:40 pm and ended at 22:15 hours. How long did it last?
A. 2 hours 5 minutes
B. 2 hours 35 minutes
C. 3 hours 5 minutes
D. 3 hours 35 minutes

Answer 1

The above problem can be resolved by using the basic concept of numerical subtraction. In the given problem, the value of time for starting the drama is given, along with the value of time at which finally ends. The time duration for the total period, upto which the drama has happened is calculated by taking the difference of the starting time and the ending time.

Complete step by step answer:
Given:
The start time of drama is, ${t_1} = 7:40\;{\rm{pm}} = 19:40\;{\rm{hours}}$.
The end time of drama is, ${t_2} = 22:15\;{\rm{hours}}$.
To calculate the time up to which the drama took place, we must take the difference between the end time and the start time.
Then, the expression is given as,
$t = {t_1} - {t_2}$
On substituting the values in the above expression, we get,

t = 22:15\;{\rm{h}} - 7:40\;{\rm{h}}\\\ t = 2:35\;{\rm{h}} \end{array}$$ Therefore, the drama lasts for 2 hours and 35 minutes and option (B) is correct. **Note:** To resolve the given problem, the basic mathematical calculations and the substitutions are required to remember. Along with these, one should be capable of analysing and interpreting the given data and should be eligible to calculate the final result accordingly.