Correct Answer: Option D
Step 1: Find the distance
Distance = Speed × Time
Distance = 240 × 5 = 1200 km
Step 2: Find the required speed for new time
Speed = Distance ÷ Time
Speed = 1200 ÷ (5/3)
Speed = 1200 × (3/5)
Speed = 1200 × 3 ÷ 5
Speed = 3600 ÷ 5
Speed = 720 kmph
Verification:
Therefore, the answer is D) 720 kmph.
Key Formula: When distance is constant, Speed₁ × Time₁ = Speed₂ × Time₂
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