Model 1 Basic Time & Distance using formula Practice Questions Answers Test with Solutions & More Shortcuts

Question : 26 [SSC CHSL 2012]

The speed of a bus is 72 km/hr. The distance covered by the bus in 5 seconds is

a) 74.5 m

b) 50 m

c) 60 m

d) 100 m

Answer: (d)

Using Rule 1,

Speed of bus = 72 kmph

= $({72 × 5}/18)$ metre/second

= 20 metre/second

∴ Required distance

= 20 × 5 = 100 metre

Question : 27 [SSC CGL Prelim 2005]

A train is moving with the speed of 180 km/hr. Its speed (in metres per second) is :

a) 50

b) 30

c) 40

d) 5

Answer: (a)

Using Rule 1,

Speed = 180 kmph

= ${180 × 5}/18$ m/sec = 50 m/sec

[Since, 1 km/hr = $5/18$ m/s]

Question : 28 [SSC CHSL 2012]

A train covers a distance of 10 km in 12 minutes. If its speed is decreased by 5 km/hr, the time taken by it to cover the same distance will be :

a) 11 minutes 20 sec

b) 13 minutes

c) 13 minutes 20 sec

d) 10 minutes

Answer: (b)

Using Rule 1,

Speed of train = $\text"Distance"/ \text"Time"$

= $10/{12/60}$ kmph = ${10 × 60}/12 = 50$ kmph

New speed = 45 kmph

Required time = $10/45$ hour

= $2/9 × 60$ minutes = $40/3$ minutes

= 13 minutes 20 seconds

Question : 29 [SSC CGL Prelim 2000]

A man walking at the rate of 5 km/hr. crosses a bridge in 15 minutes. The length of the bridge (in metres) is :

a) 1250

b) 1000

c) 750

d) 600

Answer: (a)

Using Rule 1,

Speed of the man = 5km/hr

= $5 × 1000/60$ m/min = $250/3$ m/min

Time taken to cross the bridge

= 15 minutes

Length of the bridge

= speed × time

= $250/3 × 15$m = 1250m

Question : 30 [SSC CGL Prelim 2002]

A car goes 10 metres in a second. Find its speed in km/hour.

a) 36

b) 48

c) 32

d) 40

Answer: (a)

Using Rule 1,

Speed of car = 10 m/sec.

Required speed in kmph

=${10 × 18}/5 = 36$ km/hr

IMPORTANT quantitative aptitude EXERCISES

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