Cars A and B start at the same time from two places 486 kilometers apart, drive towards each other, and meet each other after 3.6 hours. It is known that car A is 15 kilometers slower than car B per hour. How many kilometers does car B travel per hour?
甲、乙两车从相距486千米的两地同时出发，相向而行，经过3.6小时相遇．已知甲每小时比乙车慢15千米．乙车每小时行多少千米？
<gadget id="calculator">486 / 3.6</gadget>
<output>135</output>

<gadget id="calculator">135 - 15</gadget>
<output>120</output>

<gadget id="calculator">120 / 2</gadget>
<output>60</output>

<gadget id="calculator">60 + 15</gadget>
<output>75</output>

<result>75</result>