A swimmer can swim with velocity a in still water. He jumps in a river flowing with speed
b. The swimmer goes a distance d downstream and then returns to original position. The time consumed in the process will be
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time consumed in going downstream=
we know that- SPEED = DISTANCE/TIME
SO, (a+b) = D/T
t1 = d/a+b
time consumed in coming back =
speed = distance /time
a-b = d/t2
t2 = d/a-b
total time = t1 + t2
=. d/a+b + d/a-b
= 2ad/a²-b² ans = TOTAL TIME
we know that- SPEED = DISTANCE/TIME
SO, (a+b) = D/T
t1 = d/a+b
time consumed in coming back =
speed = distance /time
a-b = d/t2
t2 = d/a-b
total time = t1 + t2
=. d/a+b + d/a-b
= 2ad/a²-b² ans = TOTAL TIME
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