The students of 4th grade are writing a test of 30 minutes duration. The test starts at 10:10. At what time the teacher collects the answer sheets?
A
At 10:30
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B
At 10:40
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C
At 10:20
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D
At 10:50
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Solution
The correct option is B At 10:40 If it is 10:10 on the clock then the minute hand will be pointing at 2. [Since 2 x 5 = 10] Since the test duration is 30 minutes, adding 30 minutes to 10 minutes, gives us 40 minutes. 10:10 + 00:30 = 10:40 ∴ The teacher collects the answer sheet at 10:40.