Question: X and Y start walking towards each other at 8: 00 am at the speeds of 3 km/h and 4 km/h, respectively. They were initially 17.5 km apart. At what time do they meet?
Options:
A) 10 : 30 am
B) 10 : 30 pm
C) 11: 30 am
D) 11: 30 pm
Show Answer
Answer:
Correct Answer: A
Solution:
- Let they meet after x h.
Then, according to the question,
$ 3x+4x=17.5 $
$ \Rightarrow $ $ 7x=17.5 $
$ \therefore $ $ x=\frac{17.5}{7}=2.5h $
So, they meet 2.5 h after 8: 00 am. It means they meet at 10: 30 am.