Question

A boat goes 24Km upstream and 28Km downstream in 6 hours. It goes 30km upstream and 21km downstream in 6 hours and 30 minutes. Find the speed of the boat in still water. Please give me the answer as soon. I need argent.​Who will give the answer first then i will mark as braninliest.

Answer 1

Let speed of boat in still water be a km/hr.

Let rate of the current be b km/hr.

∴ Speed of the boat upstream =(a−b) km/hr.

∴

a−b/

24. +

a+b

28

=6 ...(i)

and

a−b

30

+

a+b

21

=

2

13

..(ii)

From (i) and (ii), we have

a−b

1

=

6

1

and

a+b

1

=

14

1

⇒a−b=6 and a+b=14

⇒a=10 km/hr.