Answer:
Nolan correctly identified the square numbers before and after 18.
The square roots of them are 4 and 5.
Clearly, square root of 18 should lie between 4 and 5 only.
He, then carefully squared 4.1, 4.2, 4.3 etc. and identified that 4.3 squared is nearer to 18.
Since, Nolan is finding estimated square root, his steps are cool and he didn't make any error.
The first ratio is 1:4 so if x is 6 then 6x4 is 24 your answer is 24.
3.06, 3 1/6, 3 3/4, 3.8.
Hope that helps.
Inches
Centimeters
Centimeters are more accurate.
The answer is 28.8 (the first option)
