যদি জ্বালানি তেলের দাম ২৫% বৃদ্ধি পায় তবে তেলের ব্যবহার শতকরা কত ভাগ কমাতে তেল বাবদ খরচ বৃদ্ধি পাবে না?
A. ২০%
B. ২৫%
C. ৩০%
D. ৩৫%
সঠিক উত্তরঃ
A.
২০%
Explanation:
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