1. The distance from A to B is 12 km The

Speed B is 2 kmlhr more than A

B takes 3omin less than A find the time

taken by A and B.

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# 1. The distance from A to B is 12 km The

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Answer:

The Persian Wars began in 499 BCE, when Greeks in the Persian-controlled territory rose in the Ionian Revolt. … Silver mining contributed to the funding of a massive Greek army that was able to rebuke Persian assaults and eventually defeat the Persians entirely.

Step-by-step explanation:

Please mark my ans as brainliest please

Suppose B takes t hours to walk d km.

Then, A takes (t + 2) hours to walk d km.

With double speed, A will take 1/2 (t+2) hours.

∴t−1/2(t+2)=1

⇒2 t−(t+2)=2

⇒t=4

∴ B takes 4 hours to walk d km.