A certain distance is covered at a certain speed. If half of this distance is covered in double the time, the ratio of the two speed is :

Question

নিচের অপশন গুলা দেখুন

• 2 : 1
• 4 : 1
• 1 : 4
• 1 : 16

Answer 1

সঠিক উত্তর হচ্ছে: op4 : 1

ব্যাখ্যা: Let the original speed be S₁ and time t₁ and distance be D.
Now,
(D/2)/2t₁=S2
S2=D/4t₁ and S₁ = D/t₁
Thus,S₁ /S₂
=4/1
=4:1