Question

A person is walking with uniform speed and when he has completed half his
journey he increases his speed 20% and arrives at his destination. Last half part
of his journey he completed 30 minutes earlier then first half part of journey.
How long was he walking the first half?

Answer 1

HELLO !!!......



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Let the total distance be 2a and the speed for the first half of the journey be s.

Let the time taken for the first half of the journey be T.

So,

Distance = Speed x Time

●So for the 1st part of the journey

a = st

●Similarly for the second half of the journey

a = (1.2s) (T-30)
st = 1.2 st -36 s

T = 36/0.2
= 180 minutes

●So total time elapsed in the second half of the journey

= (180-30) minutes

= 150 minutes


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Hope it helps u dear !!!

# Nikky