Cost of fencing a circular plot at the rate of Rs. 15 per metre is Rs. 3300. What will be the cost of flooring the plot at the rate of Rs. 100 per square metre ?
A. Rs. 220000
B. Rs. 350000
C. Rs. 385000
D. Cannot be determined
E. None of these
Answer: Option C
Solution(By Examveda Team)
Circumference of the plot :$$\eqalign{ & = \left( {\frac{{3300}}{{15}}} \right)m \cr & = 220\,m \cr & \Rightarrow 2\pi R = 220 \cr & \Rightarrow R = \frac{{220 \times 7}}{{2 \times 22}} \cr & \Rightarrow R = 35\,m \cr} $$
Area of the plot :
$$\eqalign{ & = \left( {\frac{{22}}{7} \times 35 \times 35} \right){m^2} \cr & = 3850\,{m^2} \cr} $$
∴ Cost of flooring :
$$\eqalign{ & = {\text{Rs}}{\text{.}}\left( {3850 \times 100} \right) \cr & = {\text{Rs}}{\text{. 385000}} \cr} $$
Related Questions on Area
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B. 153600 m2
C. 30720 m2
D. 307200 m2
E. None of these
A. 2%
B. 2.02%
C. 4%
D. 4.04%
E. None of these
A. 16 cm
B. 18 cm
C. 24 cm
D. Data inadequate
E. None of these
The percentage increase in the area of a rectangle, if each of its sides is increased by 20% is:
A. 40%
B. 42%
C. 44%
D. 46%
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