A ,motor boats whose speed is 18km/h in still water tank 1hour more to go 24km upstream then the return downstream to the same spot . Find the speed of the stream
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Your younger brother is going in hostel in hilly areas. What things you will keep in mind for
the following
(i) Choice of fabric and its finishes for his uniform
(ii) Choosing food items having long shelf life
(iii) Allocation of money for his studies in hostel
(iv) Some code of conduct for him
the following
(i) Choice of fabric and its finishes for his uniform
(ii) Choosing food items having long shelf life
(iii) Allocation of money for his studies in hostel
(iv) Some code of conduct for him
Answered by
1
Answer:
Let the speed of stream be x km / hr
For upstream = ( 18 - x ) km / hr
For downstream = ( 18 + x ) km / hr
A.T.Q.
24 / 18 - x - 24 / 18 + x = 1
48 x = 324 - x²
x² + 48 x - 324 = 0
( x + 54 ) ( x - 6 ) = 0
x = - 54 or x = 6
Since speed can't be negative .
Therefore , speed of the stream is 6 km / hr .
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