alleryযদি এটা নিৰ্দিষ্ট পথত দ্ৰুতি 20% হ্ৰাস পায়, তেন্তে ভ্ৰমণৰ সময় কিমান শতাংশ বৃদ্ধি পাব?
A15%
B20%
C30%
D25%
Answer & Solution
Correct answer: D. 25%
সময় পুৰণি সময়ৰ 1/0.8 = 1.25 গুণ হয়, অৰ্থাৎ 25% বৃদ্ধি।
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