Please friends help me answer this question its urgent i have to submit by tomorrow itself plzzz
Topic : Speed, Time And Distance
Question: A Man Starts From P And Reaches Q In 9 Hours After Travelling Half The Distance At
5 km/hr And Remaining At 4 km/hr . Find The Distance Between P And Q.

1

Answers

2015-01-28T19:22:01+05:30
Let total distance B/w P and Q is x km.
Time taken by the man to reach at Q. = 9 hour
A/q,
man covers the half distance with 5 km/h in 't' time.
  distance = speed × time
  x/2 = 5 × t --------------------------(1)
and remaining half distance with 4 km/h in (9-t) time
  x/2 = 4(9-t) = 36 - 4t  ------------------------(2)
From Equation (1) and (2),
        36- 4t = 5t
⇒     9t = 36
⇒         t = 4 hours
from eqn(1).,
      x/2 = 5 ×4
⇒    x = 40 km
Total distance b/w P and Q is x = 40 km.
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thanks :)
your welcome
i more question dude would u help me ??
it is just posted on the same topic
plzzz help me dude