Question

И.
1. Add the following:
2 7
а.
+
6
Я
1
1​

Answer 1

Answer:

Let speed of boat in still water be x km/h and speed of stream be y km/h.

Speed upstream= (x - y) km/h

Speed downstream= (x + y) km/h

30

x

−

y

+

44

x

+

y

=

10

40

x

−

y

+

55

x

+

y

=

13

Now Substituting

p

=

1

x

−

y

and

q

=

1

x

+

y

,then solving

p=1/5 and q=1/11

Hence

x

−

y

=

5

and

x

+

y

=

11

, Solving these,

x=8 km/hr and y=3km/hr