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?
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Answer:
speed formula is distance divided by time.
Step-by-step explanation:
speed = distance/time
speed=15/2
speed=7.5 kmh
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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