Practical Mathematics for Grade 9, Problem ID: 13634

Practical Mathematics K9The Rhind Mathematical Papyrus (1550 BC) is one of the best known examples of ancient Egyptian mathematics.

One of its problems was to calculate how many pebbles fit inside a circle having a diameter of 9 pebbles.

Can you make the estimation using modern knowledge of geometry?

68 pebbles60 pebbles56 pebbles64 pebbles