Subject
Quantitative Aptitude
Topic
Areas & Volumes
A man walking at the speed of 4 kmph crosses a square field diagonally in 3 meters.The area of the field is
A man walking at the speed of 4 kmph crosses a square field diagonally in 3 meters.The area of the field is
ক)
10000খ)
20000গ)
30000ঘ)
40000Explanation
speed of the man = 4 x (5/18) m/sec = 10/9 m/sec time taken = 3 x 60 sec = 180 sec length of diagonal = speed x time = (10/9) x 180 = 200m Area of the field = (1/2) x (dioagonal)² = (1/2) x 200 x 200 sq.m = 20000sq.mRelated questions
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