alleryএকটি 60 km ট্রিপে, 20 km/h এর পরিবর্তে 30 ব্যবহার করলে কত সময় সাশ্রয় হয়?
A2 ঘন্টা
B1/4 ঘন্টা
C1 ঘন্টা
D1/2 ঘন্টা
Answer & Solution
Correct answer: C. 1 ঘন্টা
ভ্রমণের সময়গুলি হল 60 ÷ 20 = 3 ঘন্টা এবং 60 ÷ 30 = 2 ঘন্টা, 1 ঘন্টা সাশ্রয় করে৷
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