Respuesta :
He can cut 20 1-meter pieces since 1 decametre is equal to 10 meters. So you divide 20 meters by 1 which will give you 20 pieces.
1 decametre = 10 meters
2 decametres = 10 meters x 2
= 20 meters
1 decametre = 10 meters
2 decametres = 10 meters x 2
= 20 meters
Answer: 20
Step-by-step explanation: 1 decameter has 10 meters so if he has 2 decameter long ribbons than it would be 20 meters.