A piece of wood with a length of 2.5 meters, starting from one end, is cut alternately according to the length of 30 cm and 20 cm. Each cut takes 10 minutes. How many minutes will it take to cut all the pieces? (break for 5 minutes)
将一根长2.5米的木料，从一头开始，按30厘米一段和20厘米一段的长度交替截下来，每截一次要10分钟，全部截完一共要几分钟？(中途休息5分钟)
<gadget id="calculator">90 + 45</gadget>
<output>135</output>

<result>135</result>