Question

a sailor goes 8km downstream in 40 mins and return in 1 hr determine the speed of sailor​

Answer 1

Answer:

12 km per hour

Step-by-step explanation:

see 8/40=0.2 so the sailor goes 0.2m per minute.

in one hour there are 60 mins

so we should multiply 0.2 with 60 which will be 12 km

therefore the sailor goes 12km per hour

Answer 2

Answer:

Speed of sailor=10km/hr

Speed of current=2km/hr

Step-by-step explanation:

Speed of sailor=x km/hr

Speed of current=y km/hr

8km upstream in 1 hour

8/x-y=1

X-y=8---------(1)

8km downstream in 40 minutes

8/x+y=2/3

2x+2y=24

X+y=24--------(2)

X+y=12

X-y=8

2x=20

X=10

10+y=12

Y=2