A) 104 cm
B) 52 cm
C) 78 cm
D) 126 cm
Correct Answer: D
Solution :
[d] Area of square\[=9\times 9=81\,c{{m}^{2}}\] Area of rectangle\[=81\times 6=486\,c{{m}^{2}}\] Let the length and breadth of rectangle be \['l'\] and ?b? \[\therefore \] \[l\times b=486\] ? (1) Also \[l=6b\] ? (2) \[6\,\,b\times b=486\] \[{{b}^{2}}=\frac{486}{6}=81\] \[\Rightarrow \] \[b=9\,cm\] \[\therefore \] \[l=6b=54\,cm\] Perimeter\[=2(l+b)=2(54+9)=2\times 63\] Perimeter = 126 cmYou need to login to perform this action.
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