Question

A body can takes 60 min to swim across a river, if his goal is to minimize time; and takes 180min, if his goal is to minimize to zero the distance that he is carried downstream. In both these attempts, the boy swims with the same speed relative to the river current. Which of the following statements can be true?a)
He can swim relative to water faster than the river currentb)He cannot swim relative to water faster than the river current c)If width of the river is , speed of river current is ​

Answer 1

Explanation:

आपको आता है तो आप ही करिए मेरे को नहीं आता आप ही करेंगे आई डोंट थिंक आई कैन डू इट

Answer 2

Answer:

Given condition: If a body's purpose is to reduce time, swimming across a river can take 60 minutes; if it's to minimise to zero the distance it is carried downstream, it can take 180 minutes. The youngster swims at the same rate against the current of the river in both efforts.

We have to state that: which is the correct option from all the given options.

From all the the given options, the correct option are A, C, D.

A) He can swim relative to water faster than the river.

C) If width of the river is 8 √2 km, speed of river current is 4 km.

D) If he crosses a 3 √2 km wide river in 60 √12 min, he will be carried √2km

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