Question

A boat goes 30km upstream and 44km downstream in 10h. it can go 40km upstream and 55km downstream in 13h. find speed of stream. ​

Answer 1

Time(t1)=10h

Upstream+downstream(d1)= 30+44=74km

Time(t2)=13h

Upstream+downstream(d2)= 55+13=68km

Speed=Distance/time

$= \frac{74 + 68}{10 + 13} = \frac{142}{23} = 10.92$

So speed of light= 10.92km/h

Answer 2

Step-by-step explanation:

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