Convert 3.35 m to cm: 3.35 m = 335 cm. Let string Y = 1 unit.<br><br>
[[model:questions/solutions/q4645.png]]<br><br>
&bull; X = Y + 30 = 1 unit + 30 cm<br>
&bull; Z = X + 5 = 1 unit + 30 + 5 = 1 unit + 35 cm<br>
&bull; Total = 1 unit + (1 unit + 30) + (1 unit + 35) = 3 units + 65 = 335 cm<br>
&bull; 3 units = 335 − 65 = 270 cm<br>
&bull; 1 unit = 90 cm (Y)<br>
&bull; Z = 90 + 35 = 125 cm = 1 m 25 cm<br><br>
String Z is 1 m 25 cm long.<br>
Check: Y 90 cm, X 120 cm, Z 125 cm. Total = 335 cm. ✓