The boy is 1 unit; the giraffe is 3 equal units. Together that is 4 units = 500 cm.<br><br>[[model:questions/solutions/q2534.png]]<br><br>• Boy + Giraffe = 4 units → 500 cm<br>• 1 unit → 500 ÷ 4 = 125 cm<br><br>The boy is 125 cm tall.<br>Check: 125 + 375 = 500 cm, and 375 = 3 × 125. ✓