alleryএখন গাড়ীয়ে 50 km per hour গতিত 300 km অতিক্ৰম কৰে। 75 km per hour গতিত একেটা যাত্ৰাত সময় লাগিব:
A3 hours
B4.5 hours
C5 hours
D4 hours
Answer & Solution
Correct answer: D. 4 hours
1. 50 km per hour গতিত যাত্ৰাটোত 300 / 50 = 6 hours সময় লাগে।
2. দূৰত্ব অপৰিৱৰ্তিত থাকে, সেয়েহে দ্ৰুতি আৰু সময় ব্যস্তানুপাতিক।
3. 75 km per hour গতিত সময় হ'ব 300 / 75।
4. সেইটো হ'ল 4 hours।
5. পৰীক্ষা হিচাপে, দ্ৰুতি 1.5 উৎপাদকেৰে বৃদ্ধি পায় আৰু সময় একে উৎপাদকেৰে হ্ৰাস পায়, 6 / 1.5 = 4।
_Source: syllabus Maths, Ch 11 'Direct and Inverse Proportions', S11.3 Inverse Proportion_
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