two friends start running in opposite directions from the place at the same time at the speed of 4 km per hour and 4 m per second respectively. find distance between them after 30 minutes.
Answers
Answer:
CASE 1-
SPEED= 4KM/HRS
TIME=30MINS=0.5 HOURS
DISTANCE=?
WE KNOW,
SPEED=DISTANCE/TIME
4=DISTANCE/0.5
DISTANCE= 2KM
CASE 2-
SPEED=4M/S=0.004KM/HRS
TIME=0.5 HOURS
DISTANCE=?
WE KNOW,
SPEED=DISTANCE/TIME
0.004=DISTANCE/0=5
DISTANCE=2M OR 0.002KM
THEREFORE TOTAL DISTANCE BETWEEN THEM AFTER 30 MINUTES= 2.002KM OR 2002METERS.
HOPE IT WILL HELP YOU...
Therefore the distance between two friends after 30 mins is 9.2 km.
Given:
Two friends start at the same point and at the same time in the opposite direction.
Let us name the two friends P and Q.
Let the speed of P = 4 kmph
Let the speed of Q = 4 m/s = 4 × 18 / 5 kmph = 72/5 kmph
To Find:
Distance between the friends after 30 min.
Solution:
This problem can be simply solved using the below-shown approach.
speed of P = 4 kmph
speed of Q = 72/5 kmph
By thinking logically,
⇒ If P travels 4 km in one hour then he can travel 2 km in 30 mins.
⇒ Similarly, if Q travels 72/5 km in one hour then he can travel 36/5 km in 30 mins.
So Distance between them = 2 + (36/5) = 9.2 km
Therefore the distance between two friends after 30 mins is 9.2 km.
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