Subject
Bank Exam
Topic
বাংলাদেশ ব্যাংক (অফিসার) - ০২.১২.২০২২
A train travels 360 km at a uniform speed. If the speed had been 5 km/h more, it would have taken 1 hour less for the same journey. Find the speed of the train.
A train travels 360 km at a uniform speed. If the speed had been 5 km/h more, it would have taken 1 hour less for the same journey. Find the speed of the train.
ক)
30 km/hrখ)
40 km/hrগ)
50 km/hrঘ)
60 km/hrExplanation
মনে করি, ট্রেনের গতিবেগ =x কি মি /ঘণ্টা প্রশ্নমতে , (360/x)-360(x+5) =1 বা,{360(x+5)-360x)/x(x+5)=1 বা,360x+1800-360x=x²+5x বা,1800=x²+5x বা,x²+5x-1800=0 বা,x²+45x-40x-1800=0 বা,x(x+45)-40(x+45)=0 বা,(x+45)(x-40)=0 x +45=0 বা,x=-45 অথবা x-40=0 x=40Related questions
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