The ratio between the length and breadth of a field is 7:5. The perimeter of the field is 360 meter. What is the area of the field ?

A 31000 sq. meter
B 31500 sq. meter
C 7875 sq. meter
D 8775 sq. meter

Correct Answer: 7875 sq. meter

Let the length and breadth be 7x and 5x meters respectively. Then, perimeter,  2(7x + 5x) = 360 or,  2×12x = 360 or,  24x = 360 or,  x = 360/24 = 15 Area = length×breadth =   7x × 5x = 35x2  = 35×152  = 35×225 =  7875 m2
Bissoy MCQ
#গণিত #অনুপাত-সমানুপাত (Ratio-Proportion) #Dutch-Bangla Bank Ltd #Dutch-Bangla Bank Ltd - Management Trainee Officer - 09.10.2009

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