Question

Radius of the circular garden is $9.1metre$. What is the cost (in $Rs$) of preparing lawn in it at the rate of $Rs.100per$ $1sqmetre$ ?$(\pi =\frac{22}{7})$

Answer 1

Radius of the circle is $9.1$ meter

Area of the garden$=\pi r^2$

$=\pi \times (9.1{)}^2{m}^2$

$=\pi \times 82.81m^2$

$=\frac{22}{7}\times 82.81$

Area$=260.26m^2$

$\to$ $1m^2$ cost of lawn is $200$

$\therefore 260.26m^2$ cost of lawn$=?$

Cost of preparing lawn$=\frac{260.26\times 100}{1}$

$=26,026$

The cost of preparing lawn is $26,026$.