Question

pranali and Prasad started walking to the east and the north respectively ,from the Same point and at the same speed . after 2 hours distance between them was 15√2 km . find their speed per hour?​

Answer 1

Answer:

speed formula is distance divided by time.

Step-by-step explanation:

speed = distance/time

speed=15/2

speed=7.5 kmh

Answer 2

Answer:

Solution. It is given that, Pranali and Prasad have same speed. Thus, they cover same distance in 2 hours. Let the speed be x km per hour.

It is given that , Pranali and Prasad have same speed.

Thus, they cover same distance in 2 hours .

i.e. OA=OB

By pythagoras theorem ,

In△AOB

AB

2

=AO

2

+OB

2

⇒(15

2

)

2

=AO

2

+OA

2

⇒450=2AO

2

⇒AO

2

=

2

450

⇒AO

2

=225

⇒AO=15km

⇒BO=15km

⇒Speed=

Time

Distance

=

2

15

=7.5km per hour

Step-by-step explanation:

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