9. A man travelled from the village to the post-office at the rate of 25 km/h and
walked back at the rate of 4 km/h. If the whole journey took 5 hours 48 minutes,
find the distance of the post-office from the village.
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Step-by-step explanation:
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Answer:
20 km
Step-by-step explanation:
Average speed = 2aba+b, here a=25 b=4
= 2 x 25 x 4/(25+4) = 200/29 km/hr.
Distance covered in 5 hours 48 minutes
= Speed x time = (200/29)x (29/5) Distance covered in 5 hours 48 minutes = 40kms.
Distance of the post office from the village = (40/2) = 20 km.
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