Question

The diameter of a circular flower garden is 70 m. What is the cost of fencing it, at ₹20 per metre ?

Answer 1

The diameter of the circular flower garden = d = 70 m = 2r Circumference of circular flower garden = 2πr = πd
$\frac{22}{7}\times 70$ = 220 m
The unit cost of fencing the circular garden per metre = ₹15 per meter
The cost of fencing = circumference × unit cost = 220 × 20 = ₹4400
Hence,The cost of fencing the circular flower garden = ₹4400