Math, asked by ridhi109871, 5 hours ago

A-man rows upstream in a river. When he covered 1 km from starting point his hat fell
down and started to move downstream the man kept swimming upstream for 5 minutes
but realised he has dropped his hat then rows downstream to catch the hat. Finally, the hat
and man meet at start. Find the speed of flow of river.

Answers

Answered by aaryanpurseth6
0

Answer:

5 km is the limit of the the river

Answered by VelvetRosee
0

Answer:

The Speed of the flow of river is 6 km/hr.

Step-by-step explanation:

Let the speed of the river be x and boat be y.

The speed upstream = y-x

While coming downstream his speed was = y+x

∵ The man and the hat meet at the starting point,

Distance travelled downstream = distance travelled upstream

∴ Distance travelled upstream for 5 mins = Speed dowstream * time = (y-x) × 5 [∵distance = speed×time]

∴ Total distance travelled upstream = 1 + {(y-x) × 5}

∴ Distance travelled downstream = (y+x) × 5

∵ Distance travelled downstream = distance travelled upstream

⇒ (y+x) × 5 = 1 + {(y-x) × 5}

⇒ 5y + 5x = 1 + 5y - 5x

⇒ 10x = 1

⇒ x = 1/10 km/min = (1/10) * 60 = 6 km/hr

∴ The Speed of the flow of river is 6 km/hr.

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