allery100 km এর জন্য, একটি গাড়ি তার গতি 20 km/h থেকে 25% বাড়িয়ে দেয়। সময় সংরক্ষিত?
A1/4 ঘন্টা
B1/2 ঘন্টা
C1 ঘন্টা
D2 ঘন্টা
Answer & Solution
Correct answer: C. 1 ঘন্টা
নতুন গতি হল 25 কিমি/ঘন্টা, ভ্রমণের সময় 100 ÷ 20 = 5 ঘন্টা থেকে কমিয়ে 100 ÷ 25 = 4 ঘন্টা এবং 1 ঘন্টা বাঁচায়৷
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