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Rohan leaves home between 7 a.m. and ...

Rohan leaves home between 7 a.m. and 8 a.m. and returns between 1 p.m. and 2 p.m. to find that the minute and hour hands have interchanged their positions. How long was Rohan out of the house?

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RS AGGARWAL-CLOCKS-All Questions
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  14. The angle between the minute hand and the hour hand of a clock when...

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  15. At what angle the hands of a clock are inclined at 15 minutes past ...

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