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3 June, 21:16

The solar system moves at the speed of 828,000 km/h. Tara writes the following steps to calculate this speed in decameters/second (dm/s). [1 km = 100 dm] Step 1: Divide 828,000 by 100. Step 2: Divide the result obtained in step 1 by 60. Step 3: Divide the result obtained in step 2 by 60. Step 4: Write the number obtained in step 3 with the unit dm/s. Which step is incorrect in the conversion?

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  1. 3 June, 21:32
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    The correct answer is Step 1. Step 1: Divide 828,000 by 100 is incorrect.

    Since Tara wants to convert km to dm, she should multiply by 100.

    Conversion factor: 1 km = 100 dm

    So the correct step would be as follows:

    828,000 km/h x (100 dm/1 km) = 82,800,000 dm/hr
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