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Standard XII

Mathematics

nCr Definitions and Properties

A drunken man...

Question

A drunken man takes 5 steps every second on a 60-metre long road and then take 2 steps back in the next seconds. How many seconds will it take to cover the entire road?

[Given: 1 step = 1 metre]

20 seconds

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39 seconds

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60 seconds

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40 seconds

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Solution

The correct option is A 20 seconds
In $1^{s t}$ second $= 5$ steps forward
In $2^{n d}$ second $= 2$ steps back
In $2$ seconds $= 3$ steps forwards
Total distance $= 60$ m
Time taken $= \frac{60}{3} = 20$ seconds.

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A drunken man takes 5 steps every second on a 60-metre long road and then take 2 steps back in the next seconds. How many seconds will it take to cover the entire road? [Given: 1 step = 1 metre]

The correct option is A 20 secondsIn 1st second =5 steps forwardIn 2nd second =2 steps backIn 2 seconds =3 steps forwardsTotal distance =60mTime taken=603=20 seconds.

A drunken man takes 5 steps every second on a 60-metre long road and then take 2 steps back in the next seconds. How many seconds will it take to cover the entire road?

[Given: 1 step = 1 metre]

The correct option is A 20 seconds
In $1^{s t}$ second $= 5$ steps forward
In $2^{n d}$ second $= 2$ steps back
In $2$ seconds $= 3$ steps forwards
Total distance $= 60$ m
Time taken $= \frac{60}{3} = 20$ seconds.