you are laying a concrete border around a circular pond. the pond is 7 meters in diameter and is surrounded by a path 2 meters wide. the concrete needs to be 50 millimeters deep.

you are using premixed bagged concrete
1 cubic metre (m³) requires 106 x 20kg bags.
how many 20 kg bags of premizxed concrete do you need?
round your answer to the nearest whole number​