Answer: 2 kmph
Solution:
Speed in still water = 10 kmph
stream speed = x kmph
down stream speed = 10 + x
upstream speed = 10 - x
24 / (10 + x ) = 16 / (10 - x )
240 - 24 x = 160 + 16 x
80 = 40 x
x = 2 kmph
Answer: 72 km
Solution:
let the distance between A and B be 'x' km
then, ,
=> x= 72 km
Answer: none
Solution:
none
Answer: 30km
Solution:
30km
Answer: 2.25kmph
Solution:
2.25kmph
Answer: 9kmph
Solution:
9kmph
Answer: 2.2 km/hr
Solution:
Downstream speed=24/10=2.4km/hr
upstream speed=24/12=2Km/hr
Speed of the boat in still water= \(\frac{2.4+2}{2}=2.2 km/hr\)
Answer: 5 km/hr/
Solution:
let the speed of stream= x km/hr
then, \(\frac{30}{15+x}+\frac{30}{15-x}=4+\frac{30}{60}\)
by solving the equation we get x= 5km/hr
Answer: 6 hr 50 min
Solution:
The speed of boat=36x
speed of stream=5x
speed of downstream=36x+5x=41x and upstream=36x-5x=31x
Distance covered downstream=41x(5+10/60)=41x*(31/6)
Upstream time=\(\frac{41x*31}{6*31x} =\frac{41}{6}\)
=6hr 50 mins
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Answer: 13 km/hr
Solution:
Speed of stream = ½( down stream – up stream )
= ½ ( 40 – 14 ) = 13 km/hr.