A) \[(6{{x}^{2}}-9)m\]
B) \[(-6{{x}^{2}}+9)m\]
C) \[(2{{x}^{3}}-7{{x}^{2}}+11)m\]
D) \[(6{{x}^{3}}+7{{x}^{2}}+9)m\]
Correct Answer: B
Solution :
Length of the garden \[=(2{{x}^{3}}+5{{x}^{2}}-7)m\] Perimeter of the garden \[=2\times \](length + breadth) \[\therefore \]\[4{{x}^{3}}-2{{x}^{2}}+4=2(2{{x}^{3}}+5{{x}^{2}}-7+breadth)\] \[\Rightarrow \] \[2{{x}^{3}}-{{x}^{2}}+2=(2{{x}^{3}}+5{{x}^{2}}-7)+\] breadth So, breadth of the rectangle \[=2{{x}^{3}}-{{x}^{2}}+2-2{{x}^{3}}-5{{x}^{2}}+7=(-6{{x}^{2}}+9)m\]
You need to login to perform this action.
You will be redirected in
3 sec
