jadalysrodriguez
24.06.2019 •
Mathematics
Two cyclists start at the same point and travel in opposite directions. one cyclist travels 10 km/ h slower than the other. if the two cyclists are 120 km apart after 2 hours, what is the rate of each cyclist?
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Ответ:
A⇒35 km/hr
B⇒25 km/hr
Step-by-step explanation:
Let us call them cyclist A and B.
The rate of cyclist A will be x km/h
The rate of cyclist B will be (x-10) km/h
The total distance traveled= 120 km
Time taken =2 hours
Relative speed, since they are travelling in different directions, is arrived at by addition of their individual speeds = {x+ (x-10)}km/hr (2x-10)km/hr
Distance =speed × time
120km = (2x-10)km/hr×2
120=4x-20
4x=140
x= 35 km/hr⇒ speed for cyclist A
B⇒ (x-10) km/hr=35-10=25 km/hr
Ответ:
x + y ≤ 210
Step-by-step explanation:
When a number is at most, they are less than or equal, but not greater.