Stack 2,100 cubes with side lengths of 1 cm to form a solid cuboid. Its height is 10 cm, and its length and width are greater than its height. What is the sum of the length and width of this cuboid in cm?
把棱长1厘米的正方体2100个，堆成一个实心的长方体，它的高是10厘米，长、宽都大于高，这个长方体的长与宽的和是多少厘米．
<gadget id="calculator">15 + 14</gadget>
<output>29</output>

<result>29</result>