Subject
Quantitative Aptitude
Topic
Areas & Volumes
A took 15 seconds to cross a rectangular field diagonally walking at the rate of 52 m/min and B took the same time to cross the same field along its sides walking at the rate of 68m/min. The area of the field is?
A took 15 seconds to cross a rectangular field diagonally walking at the rate of 52 m/min and B took the same time to cross the same field along its sides walking at the rate of 68m/min. The area of the field is?
ক)
50খ)
60গ)
70ঘ)
80Explanation
length of the diagonal = 52 x (15/60) =13m sum of length and breadth = 68 x (15/60) = 17m area =lb = 1/2[(2lb)] = 1/2[(l+b)² - (l²+b²)] = 1/2[17² -169] =1/2 x 120 = 60 sq.mRelated questions
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