The pieces are 1, 6 and 8 units, 15 units in all. The longest piece (8 units) is 48 cm.<br><br>[[model:questions/solutions/q4493.png]]<br><br>• Longest → 8 units = 48 cm<br>• 1 unit → 48 ÷ 8 = 6 cm<br>• Whole pipe → 15 units = 15 × 6 = 90 cm<br><br>The pipe was 90 cm long before it was cut.<br>Check: 6 + 36 + 48 = 90 cm. ✓