Latest UPSC Aptitude Question SOLUTION: Facing the east R walks straight 4 km, turns left and walks 3 km and again turns left and walks 4 km. How far is R now from the starting point? (a) 2 km (b) 3 km (c) 10 km (d) 11

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(#M40029187) UPSC question CAPF 2012 Keep an EYE

Facing the east R walks straight 4 km, turns left and walks 3 km and again turns left and walks 4 km. How far is R now from the starting point?
(a) 2 km
(b) 3 km
(c) 10 km
(d) 11 km

Asked In UPSC Rats (10 years ago)

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RAKESH  (10 years ago)

if we draw the path travel on x-y plane
final position will be 3km NORTH from starting point
OR
let x starts walking from origin(0,0)towards east
after 4km he will be at(4,0)
turn left i.e. north and walks 3km,will be at (4,3)
again turn left i.e. west and walks 4 km,
so he will finally reach at (0,3)
thus he walked from (0,0)to (0,3)
hence x will be at 3km NORTH from starting point.
(b) is corret.

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sakshi  (10 years ago)

its a kind of rectangle...when r reaches to last 4 km its parallel side is also walkes for the same distance hence it need 3 km more to reach at the starting point

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AMIT JAISWAL  (10 years ago)

on plotting the distances in a x-y plane according to the direction sense. The plane becomes a rectangle with its two opposite sides of 4 km and one beside is 3 km respectively and the side opposite to it is the distance left from the starting point.

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Ashutosh Nilesh Ujwala Patkar  (10 years ago)

You can solve this puzzle by making a diagram.
let starting point be 'a'.
let km be cm
draw 4cm in forward directionand name that point 'B'
draw 3cm in left direction and point it 'c'
draw 4cm towards you point it 'd'
measure A to D .
it is 3cm=3km

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shashank  (10 years ago)

the answer is 3

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nandanaidu  (10 years ago)

3 kms.....

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