The cost of cementing a square courtyard at $R s .11$ per square metre is $R s .1100$ . Find the cost of fencing it at the rate of $R s .10$ per metre.

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Solution

Cost of $1 m^{2} = 11$ Rupees
Cost of $x m^{2} = 1100$ Rs.
Area $= 1100 \div 11$
$= 100 m^{2}$
Side $= \sqrt{100} = 10$ m
Perimeter $= 4 \times S$
$= 4 \times 10 = 40$ m
Cost of $1$ m $= 10$ Rs.
Cost of $40 m = 10 \times 40$
$= 400$ Rs.

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The cost of cementing a square courtyard at Rs.11 per square metre is Rs.1100. Find the cost of fencing it at the rate of Rs.10 per metre.

Cost of 1m2=11 RupeesCost of xm2=1100 Rs.Area =1100÷11=100m2Side=√100=10mPerimeter=4×S=4×10=40mCost of 1m =10Rs.Cost of 40m=10×40=400 Rs.

The cost of cementing a square courtyard at $R s .11$ per square metre is $R s .1100$ . Find the cost of fencing it at the rate of $R s .10$ per metre.

Cost of $1 m^{2} = 11$ Rupees
Cost of $x m^{2} = 1100$ Rs.
Area $= 1100 \div 11$
$= 100 m^{2}$
Side $= \sqrt{100} = 10$ m
Perimeter $= 4 \times S$
$= 4 \times 10 = 40$ m
Cost of $1$ m $= 10$ Rs.
Cost of $40 m = 10 \times 40$
$= 400$ Rs.