Aspire Faculty ID #14537 · Topic: TANCET MCA 2024 · Just now
TANCET MCA 2024

Rahul can row downstream at 11 km/h and upstream at 7 km/h. Find the speed of Rahul in still water and speed of current.

Solution

Let speed of Rahul in still water = b km/h 
and 
speed of current = c km/h. 
Then, Downstream speed = b + c = 11
Upstream speed = b - c = 7 
Adding both: 2b = 18 
b = 9 
Subtracting: 2c = 4 
c = 2
✅ Rahul’s speed in still water = 9 km/h 
✅ Speed of current = 2 km/h

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