Question

Find the square root of 12.5 correct to one decimal place

Answer 1

square root 12.5=3.5
and after rounding off it becomes 4

Answer 2

12.5 can also be written as = 1250/100

square root of 1250/100 = (25root2)/10 = 2.5root2

and if you want the answer without root then root2 value is 1.414

so 2.5 * 1.414 = 3.535 is the square root of 12.5 that is 3.5 round off