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A boat goes 12 km upstream and 40km in downstream in 8 hours.if can go 16 km upstream and 32 km downstream in same time. find the speed of boat in still

water and speed of the stream?rs.


Take speed of boat in still water =xkm/hr nd in stream water =ykm/h fir upstream speed will be x-y nd for downstream it will be x+y km/hr. As time =dist/speed for 1st case 12/x-y +40/x+y =8 now let x-y =p x+y=q 12p+40q=8 ~ly for 2nd case it will be 16/x-y+32/x+y=8 =>16p+32q=8 wth any metho
0 0 0
It was not completed fully here is th ans wth any method substitution,elimination or cross multiplication you will get value of p nd q it's p=1/4 nd q=1/8 as p=1/x-y 1/8=1/x-y ie x-y=8 ~ly q=1/x+y nd x+y =4 with elimination you will get value of x nd y x=6 y=2 speed of boat in still water = 6km/hr nd in stream water =2km/hr
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