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Vishal Jain

· started a discussion

· 1 Months ago

why these distance are taken???? (Question: 216837.3 )

why these distance are taken?

Question:

DIRECTIONS: Study the table carefully and answer the following questions.

The table gives the distances (in km) of direct routes among five cities

P

Q

R

S

T

P

X

150

230

75

120

Q

150

X

300

410

415

R

230

300

X

200

160

S

75

410

200

X

140

T

120

415

160

140

X

A person has to start from P. He can take any route but has to cover all the cities and finally reach P. What is the minimum time taken if the person has to move at a speed of 50 kmph on all the routes?

Options:
A) 22 hours
B) 19 hours 30 min.
C) 18 hours 12 min.
D) 16 hours 18 min.
E) None of these
Solution:

Ans. (c) For minimum time, person has to take the routes with minimum distance.

For minimum distance, the routes will be P – T – S – R – Q – P.

Distance = 120 + 140 + 200 + 300 + 150 = 910 km

Minimum time = 910/50 = 18 hours 12 min.

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