alleryযদি একটি নির্দিষ্ট রুটে গতিবেগ 20% হ্রাস পায়, তবে ভ্রমণের সময় শতকরা কতটা বৃদ্ধি পাবে?
A15%
B20%
C30%
D25%
Answer & Solution
Correct answer: D. 25%
সময় পূর্বের সময়ের 1/0.8 = 1.25 গুণ হয়, অর্থাৎ 25% বৃদ্ধি।
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