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Standard X

Mathematics

Area of a Sector of a Circle

I left home f...

Question

I left home for bringing milk between 7am and 8am. The angle between the hour-hand and the minute hand was $90^{\circ}$ . I returned home between 7 am and 8 am. Then also the angle between the minute-hand and hour-hand was $90^{\circ}$ . At what time (nearest to second) did I leave and return home?

7h 18 m 35s & 7h 51m 24s

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7h 19m 24s & 7h 52m 14s

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7h 20m 42s & 7h 53m 11s

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7h 21m 49s & 7h 54m 33s

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Solution

The correct option is D
7h 21m 49s & 7h 54m 33s

Leaving time = 7 hr 21 m 49 sec.

and Returned time = 7 hr 54 m 33 sec.

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I left home for bringing milk between 7am and 8am. The angle between the hour-hand and the minute hand was 90∘. I returned home between 7 am and 8 am. Then also the angle between the minute-hand and hour-hand was 90∘. At what time (nearest to second) did I leave and return home?

The correct option is D 7h 21m 49s & 7h 54m 33s Leaving time = 7 hr 21 m 49 sec. and Returned time = 7 hr 54 m 33 sec.

I left home for bringing milk between 7am and 8am. The angle between the hour-hand and the minute hand was $90^{\circ}$ . I returned home between 7 am and 8 am. Then also the angle between the minute-hand and hour-hand was $90^{\circ}$ . At what time (nearest to second) did I leave and return home?

The correct option is D
7h 21m 49s & 7h 54m 33s

Leaving time = 7 hr 21 m 49 sec.

and Returned time = 7 hr 54 m 33 sec.