Question

如果 $200 \le a \le 400$ 且 $600 \le b \le 1200$ ，那么商 $\dfrac{b}{a}$ 的最大值是

If $200 \le a \le 400$ and $600 \le b \le 1200,$ then the largest value of the quotient $\dfrac{b}{a}$ is

$\dfrac32$

$3$

$6$

$300$

$600$

当 $b$ 取最大值、 $a$ 取最小值时，商 $\dfrac{b}{a}$ 最大，得到 $\dfrac{1200}{200} = 6$ 。

所以正确答案是 C。

The quotient $\dfrac{b}{a}$ is largest with the biggest $b$ and smallest $a,$ giving $\dfrac{1200}{200} = 6.$

Thus, the correct answer is C .