A) 30 m, 50 m
B) 40 m, 60 m
C) 20 m, 40 m
D) 10 m, 30 m
E) None of these
Correct Answer: C
Solution :
Explanation Let the breadth of rectangle be x. Then length will be \[\operatorname{x} + 20\] According to question \[2\left( x + 100 + x - 20 \right) = 2\left[ 2\left( x + x + 20 \right) \right]\] \[\Rightarrow \,\,\,2 \left( 2x + 80 \right) = 4\left( 2x + 20 \right)\] \[4x + 160 = 8x + 80\] \[4x = 80\] \[\Rightarrow \,\,\,x=20\] \[\operatorname{breadth} = 20m\] \[\operatorname{length} = 20 + 20 = 40 m.\]You need to login to perform this action.
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