Question

The radius of circular Garden is 4.2 kilometre find the cost of wiring its circumference at 15 paise per metre

Answer 1

hope it helps you out

Answer 2

4.2 km =4.2×1000m=4200m

circumference=2(pi)×R

$2 \times \frac{22}{7} \times 4200$

26400m

26400×15 paisa

396000 paisa

396000÷Rs100

Rs3960