Current location - Training Enrollment Network - Books and materials - The distance from Xiaolijia to the library is 900 meters. He walked from home to the library in 3 minutes 180 meters. At this rate, how many roads does Xiao Li have to walk?
The distance from Xiaolijia to the library is 900 meters. He walked from home to the library in 3 minutes 180 meters. At this rate, how many roads does Xiao Li have to walk?
Suppose there are still x minutes to arrive at the library, because speed * time = distance, the total distance is known, and the remaining distance is known, so you need to know the speed to find the time. The speed is 180/3.
The equation should be: distance traveled+time required for walking * walking speed = total distance.
∴ 180+x*( 180/3)=900
x= 12
It's similar in nature to upstairs. It's just that mine is not in proportion ~ I wonder if it can be better understood?