Question

Three pieces of wood are cut from a plank 1 metre long.

Each piece is 30 cm long.
How long is the piece left over

Answer 1

The piece left over is 10 cm long

Explanation:

1 metre = 100 cm

Each piece = 30 cm long

Number of piece = 3

30 × 3 = 90

100 - 90 = 10 cm

Therefore, the piece left over is 10 cm long