Purchase price, profit and sales price
The purchase price is 1000 yuan, and the profit is not less than 5%. Then the selling price is at least1000× (1+5%) =1050. 1050/ 1500 =0.7=7/ 10。 So the minimum discount is 30%.
Commodity purchase price
Let the purchase price of this commodity be X yuan. 132*0.9-x=0. 1x . 1. 1x = 1 18.8 .x= 108 .
♂? Speed and perimeter
The velocity of a and b is x, y, and the circumference is s/x = 60. s/(x+y) = 40. s/y =1(1/40-1/60) =1.