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\\November 23, 2023 10:50 AM Surender Prajapati Proof 5 Reader _________________________ Date: ___________________74

example 4: Subtract 18 years 9 months from 23 years. years Months
Solution: We have, 23 years = 23 years 00 months 22 12

= 22 years 12 months – 23 00
18
09
and 18 years 9 months = 18 years 09 months 4 03
Required difference = 4 years 3 months
example 5: The running time of a Vande Bharat train from New Delhi to Varanasi is 8 hours.
If the train departs from New Delhi station at 6:15 a.m., at what time will it reach Varanasi?

Solution: The train will reach Varanasi 8 hours later than 6:15 a.m.
So, we add 8 hours to 6:15 a.m.

6:15 a.m. = 06 hours 15 minutes
8 hours = + 08 hours 00 minutes

= 14 hours 15 minutes
14 hours 15 minutes = 2:15 p.m.

Thus, the train will reach Varanasi at 2:15 p.m.

Knowledge Desk

Vande Bharat Train is the fastest train in India. The coaches of the train are fitted with
automatic sliding door and all the coaches are attached to each other. The first Vande Bharat
Train was flagged off on New Delhi - Kanpur - Varanasi on Feb 15, 2019.

example 6: Mayank’s school starts at 7:30 a.m. and closes at 2:15 p.m.
Find the working hours of the school. school
Solution: Closing time of the school = 2:15 p.m.
= 1415 hours
Opening time of the school = 7:30 a.m. = 0730 hours h min
13
75
Working hours of the school = 1415 hours – 0730 hours 14 15
= 0645 hours – 7 30
= 6 hours 45 minutes 6 45
Thus, the working hours of the school is 6 hours 45 minutes.
example 7: A train leaves Meerut station at 9:50 p.m. and reaches Kolkata at 5:30 a.m. the
next day. Find the duration of the journey. h min
Solution: Departure time of the train = 9:50 p.m. = 2150 hours 23 60
Time interval from 9:50 p.m. to 12 midnight 24 00
= 2400 hours – 2150 hours – 21 50
2
10
= 0210 hours
= 2 hours 10 minutes
teacher’s Discuss with children that: Starting time + Duration = Finishing time
tip Finishing time – Duration = Starting time

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