Question 1031559
Kayaker takes 3 hours to cover distance of 30 miles downstream. It takes 5 hours to cover the same distance upstream. Assume his average speed of the kayaker and current were constant. Find the speed of the kayaker in still water and speed of current. 
distance =30
let  the speed of kayaker is x miles/hrs 
water current speed is y miles /hrs 
downstream speed will be  x+y miles/hrs
upstream speed =x-y miles/hrs 
speed=distance/time  or  speed x time =distance 
30=3(x+y)  or x+y=10
30=5(x-y)   or  x-y=6  by solving equations  we can say


 x= 8mils/hrs  y= 4 miles/hrs