It takes John 13 seconds to run 100 meters.  He only goes 4 meters in the first second.  He then maintains the same speed for the rest of the race.  James is 2 m/s faster at the top speed and he can run the first 10 meters in 2 seconds.  How long does it take James to run 100 meters?
John runs 100-4=
<gadget id="calculator">100-4</gadget>
<output>96</output>
96 meters once he reaches his max speed.
He runs it in 13-1=
<gadget id="calculator">13-1</gadget>
<output>12</output>
12 seconds.
So he runs at a speed of 96/12=
<gadget id="calculator">96/12</gadget>
<output>8</output>
8 m/s.
So that means James's top speed is 8+2=
<gadget id="calculator">8+2</gadget>
<output>10</output>
10 m/s.
He has to run 100-10=
<gadget id="calculator">100-10</gadget>
<output>90</output>
90 meters at his top speed.
So he runs that at 90/10=
<gadget id="calculator">90/10</gadget>
<output>9</output>
9 seconds.
So he takes 9+2=
<gadget id="calculator">9+2</gadget>
<output>11</output>
11 seconds to run 100 meters.

<result>11</result>