Multiple choice

Passage

In the given questions three quantities (Q1 ,Q2 and Q3) are given you have to compared these quantities and answer the given questions.

Q1: A hovercraft can run 60km/h on still water but due to ocean current its speed is reduced by 20%. And speed on land is 40km/h. find the average speed if its runs same time in ocean and on land? Q2: A man drive a car in 4×400m track of a ground. If he completed two and one fourth of round in 5 min 24 sec. Then speed of car is? Q3: Speed of Train, if a train is crossed a platform of its same length in 15 seconds and crossed a 50 m long train in 10 second.

  1. Q1 > Q2 > Q3

  2. Q1 Q3

  3. Q1 < Q2 < Q3

  4. Q2 < Q1 < Q3

  5. Q1< Q2 = Q3
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Q1: Ocean speed = 60×0.8 = 48 km/h, Land speed = 40 km/h. Average speed with equal time = (48+40)/2 = 44 km/h. Q2: Track = 400m, 2.25 rounds = 900m in 5min24sec = 324sec. Speed = 900/324 = 2.78 m/s = 10 km/h. Q3: Let train length = L. Speed = L/15 (crossing platform) = (L+50)/10 (crossing 50m train). Solving: L/15 = (L+50)/10 gives L=150m. Speed = 150/15 = 10 m/s = 36 km/h. Comparison: 44 > 10 < 36, so Q2 < Q3 < Q1, which means Q2 < Q1 < Q3.

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