Y=0.6X,
(1) when x = 2.8m, the shadow y = 1.68m,
⑵ y = 0.9m,0.9=0.6X,X= 1.5,
That is Lele 1.5 meters.
2。 Set the original price of x yuan,
According to the meaning of the question:
( 1+ 10%)X-0.95 X = 18000
0. 15X= 18000
X =120,000 yuan =120,000 yuan.