Q31:
A solid yellow stripe is to be painted in the middle of a certain highway.If 1 gallon of paint covers an area of p square feet of highway, how many gallons of paint will be needed to paint a stripe t inches wide on a stretch of highway m miles long?(1 mile = 5,280 feet and 1 foot = 12 inches)
1加仑可以覆盖 p feet,且 1 foot=12in,12p为feet换算成inch。问你 M mile上画个t in的路向标需要多少加仑且1mile=5,280feet,那M 换算成 feet=5280 x m (feet),再加上你要在 M 上喷 t inch就是5280mt ,所以就是5280mt/12p
不知道有没有帮到作者: miachw901304 时间: 2010-7-25 08:34