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Muskan would like to complete all her homework before 10 pm in order to watch an important TV programme. She has 40 minutes assignment in each of her 5 prepared subjects. What is the latest time at which she can start and still complete her homework in time for the programme?
1. 6:30 pm
2. 6:40 pm
3. 7:10 pm
4. 7:20 pm

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Correct Answer - Option 2 : 6:40 pm

Time required to complete each assignment = 40 minutes.

No. of subjects = 5

Thus, time required to complete 5 assignments = 40 × 5 = 200 minutes = 3 × 60 + 20 = 3 hours 20 minutes.

Now. 10 p.m. - 3 hours 20 minutes = 6. 40 p.m.

Therefore, Muskaan should latest begin by 6. 40 p.m so that she can start and complete her homework in time for the programme.

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