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Ashwani Kumari

· started a discussion

· 1 Months ago

Q 57 (Question:506601.0)

how is it solved

Question:

DIRECTIONS: Read the following information carefully and answer the questions that follow.

In a country, the following signals

 are applicable:       

4 Red Lights

Stop

3 Red Lights

Turn Left

2 Red Lights

Turn Right

4 Green Lights

Go@150kmph

3 Green Lights

Go @ 60 kmph

2 Green Lights

Go @40 kmph

A man is going  towards north and follows the given signals as: 

Starting point

2 Green Lights

After half-an-hour, 1st Signal

3 Red and 3 Green Lights

After 15 minutes, 2st Signal

2 Red and 3 Green Lights

After half-an-hour, 3rd Signal

2 Red and 4 Green Lights

After 24 minutes, 4th Signal

3 Red and 3 Green Lights

After 15 minutes, 5th & Last Signal

4 Red Lights
What is the total distance covered by the man till the last signal? 
Options:
A) 140 km 
B) 120 km
C) 110 km
D) 84 km
E) 130 km
Solution:
ANS (A):

As per the question,  

                                  From starting point to point 1; (Speed=40kmph; Time=30min or 1/2 hour) Distance=40*1/2=20km

                                              From  point1 to point 2; (Speed=60kmph; Time=15min or 1/4 hour) Distance= 1/4*60=15km

                                              From  point2 to point 3; (Speed=60kmph; Time=30min or 1/2 hour) Distance= 1/2*60 30=km

                                              From  point3 to point 4; (Speed=150kmph; Time=24min or 4/10 hour) Distance= 4/10*150=60km

                                              From  point4 to point 5; (Speed=60kmph; Time=60min or 1/4 hour) Distance= 1/4*60=15km

  Total distance= 20+15+30+60+15=140 km

Knowledge Expert

· commented

· 1 Months ago

Do check the detailed solution we uploaded.
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