SOLUTION: Bob is climbing down a ladder while Roy is climbing up another one. Each ladder has 30 rungs. Bob went down 2 rungs every second while Roy went up 1 rung every second. At some p

Question 809854: Bob is climbing down a ladder while Roy is climbing up another one. Each ladder has 30 rungs. Bob went down 2 rungs every second while Roy went up 1 rung every second. At some point they were at the same height. Which rung were they on?
Answer by mananth(16946) (Show Source): You can put this solution on YOUR website!
Bob is climbing down a ladder while Roy is climbing up another one. Each ladder has 30 rungs. Bob went down 2 rungs every second while Roy went up 1 rung every second. At some point they were at the same height. Which rung were they on?
Bob went down 2 rungs every second
while Roy went up 1 rung every second.
they are moving towards each other add up their rates
2+1=3 rungs/second
total 30 rungs
time taken to meet is d/r
30/3
=10 seconds
bob rate = 2 rungs/s . d=rt, 2*10= 20 rungs from top

RELATED QUESTIONS
word problem: Bob climbed down a ladder from his roof, while Rob climbed up another... (answered by bucky)

I need help with the following quetion : A firefighter spraying water on a fire stood on... (answered by stanbon)

lauren was trimming a tree next door. She first moved to the middle rung of her ladder to (answered by josmiceli)

You are standing on a middle rung of a ladder. If you first move up to three rungs, then... (answered by ewatrrr)

can someone answer this? Kathy stood on the middle rung of a ladder. She climbed up 2... (answered by Alan3354)

Helppppppppppp explanation and answer please Kathy stood on the middle rung of a... (answered by Alan3354,Edwin McCravy,MathTherapy)

A fire fighter stood on the middle rung of a ladder, went up 3 rungs, was forced downs... (answered by greenestamps)

A fireman stood on the middle rung of a ladder pouring water on a building. As the smoke... (answered by coyote)

A boat lies at anchor in a harbor. the boat has a ladder over the side just touching the... (answered by ankor@dixie-net.com)