#### Prev Next

**Time and Distance:**

- Speed = Distance/Time , Time = Distance/Speed, Distance = Speed * Time
- x km/hr = (x* 5/18) m/sec
- x m/sec = (x* 18/5) km/hr
- If the ratio of the speeds of A and is a:b, then the ratio of the time taken by them to cover the same distance is 1/a : 1/b or b:a
- Suppose a man covers a certain distance at x km/hr and an equal distance at y km/hr. Then, the average speed during the whole journey is (2xy/(x+y)) km/hr

# Aptitude Questions:

1. An athlete runs 200 mtrs race in 24 seconds. His speed is:

A) 40km/hr

B) 34 km/hr

C) 28 km/hr

D) 30 km/hr

E) None of these

View Answer

Answer: option (D)

Explanation:

Speed = (200/24) m/sec = 25/3 m/sec = (25/3*18/5 ) km/hr = 30 km/hr

2. A man walking at the rate of 5km/hr crosses a bridge in 18 minutes. The length of the bridge (in metres) is:

A) 600

B) 750

C) 1500

D) 1250

E) None of these

View Answer

Answer: option (C)

Explanation:

Speed = (5*5/18 ) m/sec = (25/18) m/sec

Distance covered in 15 minutes = ((25/18)*18*60)) m = 1500m.

3. A car is running at a speed of 126km/hr. What distance will it cover in 20 seconds?

A) 450 metres

B) 550 metres

C) 700 metres

D) 300 metres

E) None of these

View Answer

Answer: option (C)

Explanation:

Speed = 126 kmph = (126*5/18 ) m/sec = 35 m/sec

∴ Distance covered in 20 sec = (35 * 20)m = 700m.

4. A truck covers a distance of 550 metres in 1 minute whereas a bus covers a distance of 33 kms in 45 minutes. The ratio of their speed is:

A) 3:4

B) 4:3

C) 3:5

D) 50:3

E) None of these

View Answer

Answer: option (A)

Explanation:

Ratio of speeds = (550/6)*(18/5 ) : (33/45)*60 = 33 : 44 = 3 : 4

5. An airplane covers a distance at a speed of 250 kmph in 5 hours. To cover the same distance in 1(2/3) hours, it must travel at a speed of:

A) 300 kmph

B) 360 kmph

C) 600 kmph

D) 750 kmph

E) None of these

View Answer

Answer: option (D)

Explanation:

Distance = (250 * 5) km = 1250 km

∴ Required speed = (1250*3/5 ) km/hr = 750 km/hr