Question

Out of the swans in certain lake 10 times the square root of the number went away to manasoravar on advent of Rain. 1/8 th of number went away to forest by lake stala Padmini. 3 pairs of swans remained in tank. What is the total no of swans?

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Answer 1

Answer:

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Answer 2

Let the total number of swans be x.

Then,Number of swans playing on the shore of the tank =

2

7

x

It is given that there are two remaining swans

∴x=

2

7

x

+2

⇒x−

2

7

x

−2=0

⇒y

2

−

2

7

y−2=0 (where y

2

=x)

⇒2y

2

−7y−4=0

⇒2y(y−4)+(y−4)

⇒y=4ory=−

2

1

⇒ y=4 (∵y=−

2

1

is not possible)

⇒x=y

2

=4

2

=16

Hence the total number of swans is 16.

Step-by-step explanation:

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