Subject
Bank Exam
Topic
EXIM Bank Ltd. - Trainee Assistant Officer - (10.01.2020) 2019 [IBA, DU]
A bus travels a distance of 315 km at a uniform speed . If the speed of the bus were 90% of the original speed, it would have taken 2.5 hours more to cover the same distance. The original speed was-
A bus travels a distance of 315 km at a uniform speed . If the speed of the bus were 90% of the original speed, it would have taken 2.5 hours more to cover the same distance. The original speed was-
ক)
14 Km/hourখ)
13 Km/hourগ)
12.6 Km/hourঘ)
11.6 Km/hourঙ)
NoneExplanation
প্রশ্নে বলা হচ্ছে, একটি বাস 315 কিলোমিটার পথ সুষম গতিতে যায় । গতিবেগ মূল গতিবেগের 90% হলে ঐ দূরত্ব যেতে 2.5 ঘন্টা বেশি লাগে । মূল গতিবেগ কত ? ঘড়ি, মূল গতি বেগ x kmph x kmph বেগে 315 কিলোমিটার পথ যেতে সময় লাগবে = 315/x ঘন্টায় প্রশ্নমতে, 315/x এর 90% - 315/x = 2.5 => 315/( 90/100 )x - 315/x = 2.5 => 315×10/9x - 315/x = 2.5 => (3150-2835)/9x = 2.5 => 315 = 9x × 2.5 ∴ x = 315/( 9 × 2.5 ) = 14 Kmph .Related questions
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ENORMOUS