PDF chapter test TRY NOW

If the height of the mother casts a shadow of 4 \(m\) at a certain time and the height of the child casts a shadow of 0.9 \(m\). If the height of the child is 0.5 \(m\), find the height of the mother.
 
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The height of the mother is  \(m\).
 
(Note: If the answer is a whole number, write as it is. If not, round off the answer to \(3\) decimal places.)