sir , what will be the number of significant number in
2657400000 kg and in
200780.( a decimal point is there after 200780)

Please find below the solution to the asked query:

i As, 2657400000 kg=2.6574×109So, 2657400000 has 5 significant digitsii As, 200780.        It doesn't symbolises anything if there are no digits after a decimal pointor 200780.=200780=2.0078×105So, it has 5 significant digits

Hope this information will clear your doubts about the topic.
Regards

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