Question

plz tell me the answer.....i really need it right now.....​

Answer 1

on putting the unknown velocity as x

Answer 2

[0010001111]... Hello User... [1001010101]
Here's your answer...

Avg. speed = Total distance/Total time
Total time = Total Distance/Avg. Speed
= 120/60
= 2 hours

30 km have already been travelled at 30 kmph
Time for first part = 30 km/30 kmph
= 1 hour

Time remaining = Total time-Time for first part
= 2-1
= 1 hour

Distance remaining = 90 km

Speed for remaining part = 90/1
= 90 kmph

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