Question

no scam will be given brain list ​

Answer 1

Step-by-step explanation:

1)

Speed of the boat ,B= 5km/hr

speed of the current,S = x km/hr

upstream = Boat speed - current speed

U = B - S = 5-x km/hr

Downstream= Boat speed + current speed

D = B + S = 5+x km/r

2)

let's take 50 rs note as X ,100 rs note as Y,

50X + 100Y = 800