A boy can swim in still water at 1 m/s. He swims across a river flowing at 0.6 m/s which is 336 m wide. If he travels in shortest possible time, then what time he takes to cross the river?

Question

A boy can swim in still water at 1 m/s. He swims across a river flowing at 0.6 m/s which is 336 m wide. If he travels in shortest possible time, then what time he takes to cross the river? (A) 250 s (B) 420 s (C) 340 s (D) 336 s

Tardigrade Admin · Accepted Answer

Time to cross river T= (336/1)=336 sec <img class="img-fluid question-image" alt="image" src="https://cdn.tardigrade.in/img/question/physics/3737c3b7f6980f246f1b02042903b3d2-.jpeg" />

Q. A boy can swim in still water at $1 m / s$ . He swims across a river flowing at $0.6 m / s$ which is $336 m$ wide. If he travels in shortest possible time, then what time he takes to cross the river?

250 s

420 s

340 s

336 s

Time to cross river

$T = \frac{336}{1} = 336$ sec

Q. A boy can swim in still water at 1m/s. He swims across a river flowing at 0.6m/s which is 336m wide. If he travels in shortest possible time, then what time he takes to cross the river?