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The motor boat whose speed is 18km/h in still water takes 1 hour more to go.24 upstream than to return to the same point . find the speed of the streamplease answer me...... |
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Answer» Answer: 6km/hr. Step-by-step EXPLANATION: b=18km/hr to FIND s. u.s=b-s=18-s d.s=b+s=18+s let. DISTANCE be x. time taken u.s=x/18-s time taken d.s=x/18+s distance is given x=24km. 24/(18-s)-24/(18+s)=1 432+24s-432+24s=324-s square s square+48s-324=0 s=6km/hr use SREEDHAR acharya formula. also refer the attachment. |
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