Riya leaves her house to go to her friend's house. she walks at 4 km/h. at the same time, her friend siya leaves her house for riya's house and walks at 3 km /h. if they live 21 km apart, how long will it take to meet riya and siya on the way.
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22
solution:
Relative velocity of Riya/siya W.R.T siya/Riya= 4+3=7km/h
Now, Time= distance/speed
so,time required= 21/7= 3 hours
Hence, Riya & siya will meet after 3 hours
____________
Amrit
Relative velocity of Riya/siya W.R.T siya/Riya= 4+3=7km/h
Now, Time= distance/speed
so,time required= 21/7= 3 hours
Hence, Riya & siya will meet after 3 hours
____________
Amrit
Answered by
0
Answer:
riya and siya take 3hrs to meet on the way
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