Subject
Quantitative Aptitude
Topic
Speed & Distance
A, B and C are on a trip by a car. A drives during the first hour at an average speed of 50 km/hr. B drives during the next 2 hours at an average speed of 48 km/hr. C drives for the next 3 hours at an average speed of 52 km/hr. They reached their destination after exactly 6 hours. Their mean speed was : (A, B ও C তিনজন কার ট্রিপে বের হয় । A প্রথম ঘন্টায় 50 km/hr বেগে, এরপর B দুই ঘন্টা ধরে 48 km/hr বেগে এবং শেষে C তিন ঘন্টা ধরে 52 km/hr বেগে চালায় । 6 ঘন্টায় তারা তাদের গন্তব্যে পৌছে । তাদের গড় গতি কত ছিল?)
A, B and C are on a trip by a car. A drives during the first hour at an average speed of 50 km/hr. B drives during the next 2 hours at an average speed of 48 km/hr. C drives for the next 3 hours at an average speed of 52 km/hr. They reached their destination after exactly 6 hours. Their mean speed was : (A, B ও C তিনজন কার ট্রিপে বের হয় । A প্রথম ঘন্টায় 50 km/hr বেগে, এরপর B দুই ঘন্টা ধরে 48 km/hr বেগে এবং শেষে C তিন ঘন্টা ধরে 52 km/hr বেগে চালায় । 6 ঘন্টায় তারা তাদের গন্তব্যে পৌছে । তাদের গড় গতি কত ছিল?)
ক)
50 km/hrখ)
50(1/3)km/hrগ)
51(1/3)km/hrঘ)
52 km/hrExplanation
মোট দূরত্ব = (50×1) + (48×2)+ (52×3) = 302 km মোট সময় লাগে = 6 hr গড় গতি (mean speed) = (302/6) (km/hr = 50 (1/3) km/hrRelated questions
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