Question

the total distance traveled by a boat 1 hour upstream and 30 minutes downstream in which the rate of current is 3kph? mathematical expression ​

Answer 1

Answer:

d = (3s-3)/2

Step-by-step explanation:

Let boat speed = s kph                      

Total distance travelled = d km

d = 60/60 (s-3) + 30/60 (s+3) =(s-3) + (s+2)/2                                                         d = [2(s-3)+(s+3)]/2                                                    

d = (3s-3)/2

Answer 2

Given: the total distance traveled by boat 1 hour upstream and 30 minutes downstream in which the rate of current is 3kph

To find: mathematical expression ​

Solution:

Distance= speed into time

distance = (3speed-3)/2

Let the boat's speed be s kph                      

The total distance traveled will be d kms.

distance = time into downstream speed + time into upstream speed                         =(speed-3) + 30/60 (speed+3)

=(s-3) + (s+2)/2                                                      

distance = [2(s-3)+(s+3)]/2                                                    

The mathematical expression ​is d = (3s-3)/2.