- 1. An aeroplane covers a certain distance of 420 Kmph in 6 hours. to cover the same distance in 4 2/3 hours, it Must travel at a speed of

A.580 Kmph

B.550 Kmph

C.540 Kmph

D.530 Kmph

Answer & Explanation

Answer: Option C

Explanation:Speed of aeroplane = 420 Kmph

Distance travelled in 6 hours

= 420 * 6 = 2520 Km

Speed of aeroplane to acver 2520 Km in 14/3

= 2520*3/14 = 540 Km

- 2. The speed of a car is 90kmph. What is the speed in metres per second.

A.25 m/s

B.40 m/s

C.35 m/s

D.28 m/s

Answer & Explanation

Answer: Option A

Explanation:**km/hr to m/sec conversion:**

x km/hr = (x × 5/18) m/sec

90 × 5/18 = 25.

- 3. The speed of a car is 10 m/s. What is the its speed in kmph.

A.25 kmph

B.30 kmph

C.50 kmph

D.36 kmph

Answer & Explanation

Answer: Option D

Explanation:**m/sec to km/hr conversion:**

x m/sec = [x x (18/5)] km/hr

10 x (18/5) 36 kmph

- 4. A car covers a distance of 720 km in10 hrs. What is its speed in mps.

A.40 m/s

B.25 m/s

C.20 m/s

D.15 m/s

Answer & Explanation

Answer: Option C

Explanation:Distance = Speed x Time

Speed = (720/10) = 72 kmph

Spees in mps = 72 x 5/18 = 4 x 5 = 20 mps.

- 5. A man covers a certain distance by car driving at 30 km/hr and he returns back to the starting point riding on a scooter at 10 km/hr. Find his average speed for the whole journey.

A.8 Km/hr

B.17 Km/hr

C.15 Km/hr

D.12 km/hr

Answer & Explanation

Answer: Option C

Explanation:= (2 x a x b)/(a + b)

= (2 x 30 x 10)/(30 + 10)

= (2 x 30 x 10)/40

= 15 km/hr

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