A reconnaissance plane flies 557km away from its base at 828(m)/(s), then flies back to its...

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A reconnaissance plane flies 557km away from its base at 828(m)/(s), then flies back to its base at 1242(m)/(s). What is its average speed? Answer in units of (m)/(s). A reconnaissance plane flies 557km away from its base at 828(m)/(s), then flies back to its base at 1242(m)/(s). What is its average speed? Answer in units of (m)/(s).