Direction 7728

Two swimmers trained together in a small pool.
Swimmer Pike will swim the pool in 16 seconds, swimmer Kaprik in 20 seconds. Both swimmers suddenly jumped into the pool from the same edge and, for 160 seconds, swam along the length of the pool back and forth, back and forth, back and forth, etc. How many seconds did they swim in the same direction?

Correct answer:

T =  80 s

Step-by-step explanation:

t1=16 s t2=20 s  n1=160/t1=160/16=10 n2=160/t2=160/20=8  T1=16 s T2=12 s T3=8 s T4=4 s T5=4 s T6=8 s T7=12 s T8=16 s T=T1+T2+T3+T4+T5+T6+T7+T8=16+12+8+4+4+8+12+16=80 s

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