Subject
NSI নিয়োগ
Topic
জাতীয় নিরাপত্তা গোয়েন্দা সংস্থা (NSI) (সহকারী পরিচালক) - ০৮.১০.২০২১
Two trucks 300 km away are travelling towards each other with a constant speed. Truck A is moving at a average speed 70 km/h while truck B is moving at average speed 50 km/h. How long does it take for them to meet.
Two trucks 300 km away are travelling towards each other with a constant speed. Truck A is moving at a average speed 70 km/h while truck B is moving at average speed 50 km/h. How long does it take for them to meet.
ক)
5 hoursখ)
3 hoursগ)
2.5 hoursঘ)
6 hoursExplanation
যেহেতু ট্রাক দুটি বিপরীত দিকে চলছে, সেহেতু এদের গতিবেগ যোগ করলে আপেক্ষিক বেগ পাওয়া যাবে। ∴ নির্ণেয় সময় = 300 / (70+50) ঘণ্টা = 300/120 ঘণ্টা = 2.5 ঘণ্টাRelated questions
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