A) 60 cm
B) 30 cm
C) 25 cm
D) 36 cm
Correct Answer: A
Solution :
Circumference of the circular wire \[=2\pi r\]\[=2\times \frac{22}{7}\times 42=264\,\,\text{cm}\] Perimeter of rectangle \[=264\,\,\text{cm}\] Let the sides of rectangle be \[6x\,\,\text{cm}\]and \[5x\,\,\text{cm}.\] \[\therefore \] \[2\,(6x+5x)=264\] \[\Rightarrow \] \[2\times 11x=264\] \[\Rightarrow \] \[x=\frac{264}{22}=12\] \[\therefore \] The smaller, side \[=5x=5\times 12=60\,\,\text{cm}\]You need to login to perform this action.
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