An object starts at a point +25 m goes 40 m toward +x direction in 5 s then suddenly changes its direction to the opposite and covers 50 m in 10 seconds.

Initial position= +25

Now object goes towards 40 m in positive X direction.

Now New position= +25 +40=+65

Now the object changes its direction in opposite direction

and covers 50 m in 10 seconds.

So New position=+65-50=+15

Now the object is 10 meter left from its initial position.

you would need to know all the numbers that are on there

step-by-step explanation:

54 kilometers per hour

step-by-step explanation:

according to rules:

1 km = 1000 meter

which means that 1 meter = 1/1000 km

1 hour = 3600 second [ as 1 hour = 60 min = 60 *60 seconds ]

which means that 1 second = 1/3600 hour

therefore, 1 kilometer/hour =

thus to convert 15 meter per second to kilometer per hour, we multiply 15 to 3.6 kilometer/hour.

15 meter/second=   which is the required answer.