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24 min + 15 min + 1 min = 40 min
Therefore, total time taken by Gopal is 40 min and 10 sec.
Example 2: Find the total of 5 hours 40 minutes and 7 hours 50 minutes.
Answer:
Hour Min
1
5 40
+ 7 50
12 90
= 13 30
Step 1: Add the minutes.
40 min + 50 min = 90 min; 90 min = 1 hour 30 min [1 hour = 60 min]
Write 30 min in the min column and carry 1 hour.
Step 2: Add hours and the carried over hour.
5 hours + 7 hours + 1 hour = 13
hours.
Therefore, the required answer is 13 hours 30 minutes.
SUBTRACTION OF TIME:
Example 3: Shejal took 40 minutes 15 seconds to complete her maths
home work and 19 minutes 20 seconds to complete her science home
work. How much more time did the maths home work take?
Answer: Time taken for maths home work is more by (40 min 15 sec – 19 min
20 sec).
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