SSC CGL Tier II 12 Jan 2017 Paper 1

Question : 43 of 100

Marks: +1, -0

Two donkeys are standing 400 metres apart. First donkey can run at a speed of 3 m/sec and the second can run at 2 m/sec. If two donkeys run towards each other after how much time (in seconds) will they bump into each other?

Validate

Solution:

(2) Distance between both donkeys = 400 metre.
Relative speed = (3 + 2) m./sec. = 5 m./sec.

∴Required time =

{\Distance} /{\Relative \speed} = 400/ 5

= 80 seconds

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