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John took half an hour to row 3 km with the current. When he returned, he took 90 min. Find his rowing rate and speed of the current.
This is my solving (but wrong >.< ):
3=30r+30t
3=90r90t
=> Eq1+1/3(Eq2)
3=30r+30t
1=30r30t

4=60r
r=4/60 and then you substitute r in any of the equations to find t, but r is supposed to be 4 O.o
 one year ago
 one year ago
John took half an hour to row 3 km with the current. When he returned, he took 90 min. Find his rowing rate and speed of the current. This is my solving (but wrong >.< ): 3=30r+30t 3=90r90t => Eq1+1/3(Eq2) 3=30r+30t 1=30r30t  4=60r r=4/60 and then you substitute r in any of the equations to find t, but r is supposed to be 4 O.o
 one year ago
 one year ago

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apoorvkBest ResponseYou've already chosen the best response.1
Your work seems alright to me, @aroub . There seems to be a problem with the given answer. Could that be a printing error or something?
 one year ago

aroubBest ResponseYou've already chosen the best response.0
I really don't think so.. Because my teacher AND the book answered it r=4 and t=2
 one year ago

experimentXBest ResponseYou've already chosen the best response.2
Multiply it by 60 ... get you answer is 4 km/hr that's all right
 one year ago

experimentXBest ResponseYou've already chosen the best response.2
what you are getting is 4/60 km/min
 one year ago

apoorvkBest ResponseYou've already chosen the best response.1
oh yeah  the units!! *facepalm*
 one year ago

aroubBest ResponseYou've already chosen the best response.0
Aooh! Right! I totally forgot about that :P Thank youu =D
 one year ago
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