Question

a boat covers a certain distance upstream in 3¹/² hours , while it comes back in 3 hours . if the speed of the stream be 2 km per hours , what is the seeds of the boat in still water​

Answer 1

Step-by-step explanation:

stream = 2km/h

DOWNSTREAM : UPSTREAM

Time 3 : 3.5

speed. 3.5 : 3

Stream= (D-U)/2

= (3.5-3)/2

= 0.5/2 = 0.25

Boat = (D+U)/2 = (3.5+3)/2

= 6.5/2

= 3.25

comparing,

0.25 part = 2

3.25 part = x

apply cross multiplication method,

x = 26 km/hr which is boat speed