Question
A car travelling at a speed of 40 km/hour can complete a journey in 9 hours. How long will it take to travel the same distance at 60 km/hour ?
Answer: Option D
Answer: (d)Total distance covered= Speed × Time= 40 × 9 = 360 km.The required time at 60 kmph= $360/60 = 6$ hours. Using Rule 9,Speed(s) ∝ $1/{time (t)}$ ⇒ s ∝ $1/t$$s_1t_1 = s_2t_2$(Provided distance is constant)
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Answer: (d)Total distance covered= Speed × Time= 40 × 9 = 360 km.The required time at 60 kmph= $360/60 = 6$ hours. Using Rule 9,Speed(s) ∝ $1/{time (t)}$ ⇒ s ∝ $1/t$$s_1t_1 = s_2t_2$(Provided distance is constant)
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