A mouse started to run at a speed of 10m/s seeing a cat 200m away. The cat noticed the mouse and started to run at a speed of 12m/s at the same time and same direction. How much time does the cat need to catch the mouse?

লাইভ পরীক্ষার প্রশ্নে একক m/s এর পরিবর্তে mph দেয়া ছিল।
প্রশ্নে ভাষাগত ত্রুটি থাকায় প্রশ্নটি বাতিল করা হলো।
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Question: A mouse started to run at a speed of 10m/s seeing a cat 200m away. The cat noticed the mouse and started to run at a speed of 12m/s at the same time and same direction. How much time does the cat need to catch the mouse?

Solution:
let the time is t seconds.
in t seconds,
the mouse covers the distance of = (10 × t) = 10t m
the cat covers = (12 × t) = 12t m

ATQ,
12t = 10t + 200
2t = 200
t = 100 seconds.