Question

教几道数学题（有点像奥数）今晚就要,

Answer 1

1、设一共加工X个小时,一共有Y个零件

42X=3/4 * (Y/6 * x)

42=y/8

Y=336

2、设飞出X千米

X/750 + X/600 = 6

(4x+5x)/300 =60

9x = 18000

x =2000

3、 设：距离是Y米,原来的速度是X米

Y/(x+15)=5/6 * y/x

1 / (x+15) = 6 / (5x)

x = 90

y / (90-15) = y/90 +4.5

y= 5/6 * y + 4.5*75

1/6 y = 337.5

y=2025