Subject
Bank Exam
Topic
জনতা ব্যাংক লিমিটেড আরসি (রুরাল ক্রেডিট) - ২৭.১০.২০২৩
A student walks from his house at a speed of (5/2) km per hour and reaches his school 6 minutes late. The next day he increases his speed by 1 km per hour and reaches 6 minutes before school time. How far is the school from his house?
A student walks from his house at a speed of (5/2) km per hour and reaches his school 6 minutes late. The next day he increases his speed by 1 km per hour and reaches 6 minutes before school time. How far is the school from his house?
ক)
5/4 kmখ)
7/4 kmগ)
9/4 kmঘ)
11/4 kmExplanation
Let, the school is at x kilometer distance , usual time is t km/hr Now x/(5/2) = t + (6/60) or, 2x/5 = t + (1/10) or, 4x = 10t + 1 or, 4x - 10t = 1 or, 28x - 70t = 7 [multiplying by 7] Again x/{(5/2) + 1} = t - 6/60 or, 2x/7 = t - (1/10) or, 20x = 70t - 7 [multiplying by 70] or, 20x - 70t = - 7 28x - 70t - 20x + 70t = 7 + 7 or, 8x = 14 or, x = 14/8 or, x = 7/4Related questions
বাংলা ব্যাকরণ গ্রন্থ প্রথম কোন বাঙালি রচনা করেন?If 4x + y= 1 and 4x - y= 4, then the values of x and y respectively are-আচার ও বোতাম শব্দ দুটি কোন ভাষা হতে বাংলায় গৃহীত হয়েছে?√(4/3) - √(3/4) = ?দুটি বাক্যকে এক বাক্যে পরিণত করার কাজ করে কোনটি?The ages of Sabiha and Suriya are in the ratio of 7 : 3 respectively. After 6 years, the ratio of their ages will be 5 : 3. What is the difference in their ages?'মনীষা' এর সন্ধি বিচ্ছেদ -A scored 30% marks and failed by 15 marks. B scored 40% marks and obtained 35 marks more than those required to pass. The pass percentage is-