Question

A circular grassy plot of land, 70m in diametre, has a path 7 metre wide running around it on the outside find the cost of gravelling the path at rupees 4 per square metre (take πr² 3.14)​

Answer 1

$7 \div 70 = 0.1 \times 4 = 0.4 \times 3.14 \times {2 = 5}^{2} 256$