The length of a room is three times its breadth. If the perimeter of the room is 64 cm, then its breadth is ?cm.

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RRB ASM Exam (Bhubaneshwar) 2009 click here to view all questions

The length of a room is three times its breadth. If the perimeter of the room is 64 cm, then its breadth is ?cm.

A64

B32

C16

D8

testing ? Jan 5 '2019 at 19:45

Answer: D [8]
Explanation:

Let the width of the room be denoted by 'W'
Since the room is three times as long as its width, length will be '3W'
 
remember perimeter of a rectangle is =  2(length + width) and is given in the question as 64 meters.
       Perimeter =  2 (length + width)
                  64 = 2 (3W + W)
                  64 = 2 (4W)
                  64 = 8W
(Dividing both sides by 8), gives
                  8 = W
 
So width of the room is 58 meters.

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Answer: D [8] Explanation: Let the width of the room be denoted by 'W' Since the room is three times as long as its width, length will be '3W'   remember perimeter of a rectangle is =  2(length + width) and is given in the question as 64 meters.        Perimeter =  2 (length + width)                   64 = 2 (3W + W)                   64 = 2 (4W)                   64 = 8W (Dividing both sides by 8), gives                   8 = W   So width of the room is 58 meters. testing ? answered Jan 5 '2019 at 19:45 All Comments

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