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aroub
 3 years 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
aroub
 3 years 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

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

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

experimentX
 3 years ago
Best ResponseYou've already chosen the best response.2Multiply it by 60 ... get you answer is 4 km/hr that's all right

experimentX
 3 years ago
Best ResponseYou've already chosen the best response.2what you are getting is 4/60 km/min

apoorvk
 3 years ago
Best ResponseYou've already chosen the best response.1oh yeah  the units!! *facepalm*

aroub
 3 years ago
Best ResponseYou've already chosen the best response.0Aooh! Right! I totally forgot about that :P Thank youu =D
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