alleryযদি দ্ৰুতি 25% বৃদ্ধি পায়, তেন্তে এটা নিৰ্দিষ্ট যাত্ৰাৰ সময় কিমান শতাংশ হ্ৰাস পাব?
A15%
B30%
C25%
D20%
Answer & Solution
Correct answer: D. 20%
নতুন সময় পুৰণি সময়ৰ 1/1.25 = 0.8 অংশ, অৰ্থাৎ 20% হ্ৰাস।
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