Question

Two cyclists start from the same point of the mountain. One travels 1200 m downward the mountain in 12 minutes , and the other travels 350m upward the mountain in the same time. how far are they from each other after 20 minutes​

Answer 1

1404 m

1st cyclist

speed

$1200 \div 12$

that is equal to 100 m per min

2nd cyclist

speed

$350 \div 12$

that is equal to 29.8 m per min

afterwards you have to calculate distance for both cyclists after 20 min use the same formula

speed is equal to distance by time

we have time and speed multiply both of them in both cases and you will get

1st cyclist 2000 m

2nd cyclist 596 m

and now subtract both of them and your answer is 1404 m