pls tell dis answer.............
Attachments:
Answers
Answered by
5
let the speed of the steamer in still water be x km/h. Then,
the speed downstream = (x + 2)km/h
n the speed upstream = (x - 2)km/h
the distance covered in 4 hours while going downstream= 4(x + 2) km
the distance covered in 5 hours while going upstream= 5(x -2) km
but, each of these distances is the distance between the two ports which is the same.
therefore, 4(x + 2) = 5(x - 2)
= 4x + 8 = 5x - 10
= x = 18
therefore, speed of steamer in still water = 18 km/h
CHECK: The speed of the steamer in still water=18km/h
The speed downstream=(18+2)km/h = 20 km/h
The speed upstream=(18-2)/h = 16 km/h
The distance covered in 4 hours while going downstream=(20*4)km = 80 km
The distance covered in 5 hours while going upstream= (16*5) km = 80 km
Thus, both the distances r equal
HOPE THIS HELPS
the speed downstream = (x + 2)km/h
n the speed upstream = (x - 2)km/h
the distance covered in 4 hours while going downstream= 4(x + 2) km
the distance covered in 5 hours while going upstream= 5(x -2) km
but, each of these distances is the distance between the two ports which is the same.
therefore, 4(x + 2) = 5(x - 2)
= 4x + 8 = 5x - 10
= x = 18
therefore, speed of steamer in still water = 18 km/h
CHECK: The speed of the steamer in still water=18km/h
The speed downstream=(18+2)km/h = 20 km/h
The speed upstream=(18-2)/h = 16 km/h
The distance covered in 4 hours while going downstream=(20*4)km = 80 km
The distance covered in 5 hours while going upstream= (16*5) km = 80 km
Thus, both the distances r equal
HOPE THIS HELPS
Answered by
1
let the speed of the steamer in still water be x km/h. Then,
the speed downstream = (x + 2)km/h
n the speed upstream = (x - 2)km/h
the distance covered in 4 hours while going downstream= 4(x + 2) km
the distance covered in 5 hours while going upstream= 5(x -2) km
but, each of these distances is the distance between the two ports which is the same.
therefore, 4(x + 2) = 5(x - 2)
= 4x + 8 = 5x - 10
= x = 18
therefore, speed of steamer in still water = 18 km/h
CHECK: The speed of the steamer in still water=18km/h
The speed downstream=(18+2)km/h = 20 km/h
The speed upstream=(18-2)/h = 16 km/h
The distance covered in 4 hours while going downstream=(20*4)km = 80 km
The distance covered in 5 hours while going upstream= (16*5) km = 80 km
Thus, both the distances r equal
HOPE THIS HELPS
the speed downstream = (x + 2)km/h
n the speed upstream = (x - 2)km/h
the distance covered in 4 hours while going downstream= 4(x + 2) km
the distance covered in 5 hours while going upstream= 5(x -2) km
but, each of these distances is the distance between the two ports which is the same.
therefore, 4(x + 2) = 5(x - 2)
= 4x + 8 = 5x - 10
= x = 18
therefore, speed of steamer in still water = 18 km/h
CHECK: The speed of the steamer in still water=18km/h
The speed downstream=(18+2)km/h = 20 km/h
The speed upstream=(18-2)/h = 16 km/h
The distance covered in 4 hours while going downstream=(20*4)km = 80 km
The distance covered in 5 hours while going upstream= (16*5) km = 80 km
Thus, both the distances r equal
HOPE THIS HELPS
baby421:
stupid personality u have just copied the same answer what asthalzi wrote. pls don't do this type of mess again
Similar questions