Sixth grade problems, the distance of (urgent! Online, etc ~ ~ ~) A and B walk from a to B at the same time. A's walking distance is 10% larger than B's. in a certain period of time, a's steps are 10% less than B's, 1) Who can get to B first? 2) If the time difference between two people arriving at B is 30 seconds, how long does it take for the first person to arrive from a to B? PS: process ~ ~ ~ fast ~ (≥ ▽≤) / ~ Lala

Sixth grade problems, the distance of (urgent! Online, etc ~ ~ ~) A and B walk from a to B at the same time. A's walking distance is 10% larger than B's. in a certain period of time, a's steps are 10% less than B's, 1) Who can get to B first? 2) If the time difference between two people arriving at B is 30 seconds, how long does it take for the first person to arrive from a to B? PS: process ~ ~ ~ fast ~ (≥ ▽≤) / ~ Lala

1) B
Because speed = distance * steps
Let B walk distance = x steps = y
Distance b = XY
A distance = 1.1 * 0.9 * xy = 0.99xy
So b > A
2、
xy-0.99xy=30
So xy = 3000
It took 3000 seconds

A and B start from two places at the same time, and run in opposite directions. After 4 hours, they meet. B travels 12 kilometers more per hour than A. It is known that when the two cars meet, B travels 1.5 times of A. the distance between two places can be calculated

12 × 4 = 48 km
48 ÷ (1.5-1) = 96 km
96 × (1 + 1.5) = 240 km The distance between the two places

The application of the sixth grade distance
The distance between the two places is 24 kilometers. The speed of uphill is 4 kilometers per hour, the speed of flat road is 5 kilometers per hour, and the speed of downhill is 6 kilometers per hour. It took 5 hours and 50 minutes to go and 5 hours to come back. How many kilometers are the uphill, flat road, and downhill from a to B?

If the distance between a and B exceeds x km above and Y km below, the road will be (24-x-y) km
Do you understand? Set up a system of two variables and reverse X and y
It's OK
Do it yourself