Symbiosis National Aptitude Test SNAP 2013 Paper

Question : 28 of 150

Marks: +1, -0

I have to reach a certain place at a certain time and I find that I shall be 15 min too late, if I walk at 4 km an hour, and 10 min too soon, if I walk at 6 km an hour. How far have I to walk?

25 km
5 km
10 km
None of these

Validate

Solution:

Distance (D) = Speed (S) × Time (T)
D =

4×(T+{15}/{60})

D = 4T +1 ...(i)
D =

6(T-{10}/{60})

D = 6T -1 (ii)
Solving equations (i) and (ii), we get
T = 1 h
D = 4 × 1 + 1 = 5 km

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