Question

17 A boat moves upstream, at the ratebof 2 km in 10 min & downstream at the rate of 2 km in 6 mim the speed of the current is....

Answer 1

speed of boat = b
speed of current=c

spéed= distance / time
upstream = 2km/10/60 hr
= 12 km/hr
upstream = 2km/6/60 hr
= 20 km/hr


b-c=12
b+c=20

simply
b=16

and c = 4

speed of current =4 km/hr