A) \[18\]
B) \[750\]
C) 24
D) 120
Correct Answer: A
Solution :
(a): From data it is clear that 30 cm = perimeter \[=2\pi r\] \[\Rightarrow \,\,r=\frac{15}{\pi }\] \[\therefore \] Area \[=\pi {{r}^{2}}=\pi \times \frac{{{\left( 15 \right)}^{2}}}{{{\pi }^{2}}}\] \[=\frac{225}{\pi }\] No. of plant \[=\frac{Area}{Area\,\,per\,\,plant}=\frac{225/\pi }{4}=\frac{225}{4\pi }\approx 18\]You need to login to perform this action.
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