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Chandan Kumar Samal

· started a discussion

· 1 Months ago

Misleading que (Question:173787.0)

I think the ans will be 20m bcz it has given that the pt is 20m from the pt opposite of bank of river

Question:
The banks of a river are parallel. A swimmer starts from a point on one of the banks and swims in a straight line inclined to the bank at 45° and reaches the opposite bank at a point 20 m from the point opposite to the starting point. The breadth of the river is:
Options:
A) 20 metre
B) 28.28 metre
C) 14.14 metre
D) 40 metre
Solution:
Ans: (c)


Knowledge Expert

· commented

· 1 Months ago

Dear Student,

14.14 meter is the only correct answer...

Short Solution:

As the angle of elevation is 45° then the ratio of P: B : H i.e. 1:1:√2

here √2 =20 then 1 =20/√2

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