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    Subject

    Quantitative Aptitude

    Topic

    Speed & Distance

    Ali starts from his home at 5 a.m. and travels towards Chittagong at an average speed of 30 km/hr. Belal starts from the same home at 7 a.m. and travels along the same route towards Chittagong, overtaking Ali at exactly 11 a.m. At what speed, in km/hr, was Belal travelling?

    ক)
    35
    খ)
    40
    গ)
    45
    ঘ)
    48
    ঙ)
    50

    Explanation

    QUESTION : Ali সকাল 5 টায় বাড়ি থেকে বের হয়ে গড়ে 30 km/hr বেগে চট্টগ্রামের দিকে যাত্রা করে। Belal একই বাড়ি থেকে সকাল 7 টায় বের হয়ে একই রুটে চট্টগ্রামের দিকে যাত্রা করে এবং ঠিক সকাল 11 টায় Ali-কে overtake করে। Belal কত km/hr বেগে যাত্রা করছিল? সমাধান: *Ali'র ভ্রমণ: -সময়: 5 a.m. থেকে 11 a.m. = 6 ঘণ্টা -দূরত্ব = 30 km/hr × 6 ঘণ্টা = 180 km *Belal'র ভ্রমণ: -সময়: 7 a.m. থেকে 11 a.m. = 4 ঘণ্টা -দূরত্ব: Ali'র সমান = 180 km *Belal'র গতি: -গতি = দূরত্ব ÷ সময় -গতি = 180 km ÷ 4 ঘণ্টা = 45 km/hr *সুতরাং, Belal 45 km/hr বেগে যাত্রা করছিল। সঠিক উত্তর: (C) 45 km/hr

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