Ans. Suppose the speed of boat in still water is x km/h and speed of stream is y km/h
Speedof boat in downstream = (x + y) km/h x+ y = 32 ?(i)
Speed of boat in upstream = (x ? y) km/h
x ? y = 28 ?(ii)
Add. Eqs. (i) and (ii), we get 2x = 60
x = 30 km/h
Ans. CP of mixture = {(40*3+60*2)/2+3} = 48 SP of the mixture = 1.1 48 =52.8
?apart? is incorrect after ?to drain water?
?has? is incorrectly used since the sentence is in past tense. Moreover, the subject is cities, which is plural.
?Documentation of the seasonality in native people? doesn?t make sense.
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