A) 75 m
B) 45 m
C) 120 m
D) 60 m
Correct Answer: A
Solution :
Let the parallel sides be \[5x\]and \[3x\]metres. Area of trapezium \[=\frac{1}{2}\] (sum of parallel sides \[\times \] distance between them) \[\Rightarrow \] \[1440=\frac{1}{2}(5x+3x)\times 24\] \[\Rightarrow \] \[12\times 8x=1440\] \[\Rightarrow \] \[x=\frac{1440}{12\times 8}=15\] \[\therefore \]The longer parallel side \[=5x=5\times 15=75\,\,\text{m}\]You need to login to perform this action.
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