Verified Answer :

TSO

We have 48 meters.
We need to increase it by 20%.
That means we have 48 and then we increase it by 20%.

That can be expressed as:
48 + (48 20%)

Now, another way to write that would be:

48 120%

Now, 120% is nothing but 120/100. This can even be simplified to 1.2.

48 120%
= 48 1.2
= 57.6

48m increased by 20% is 57.6m.

Leader

You multiply 48m with 20% and add that to 48m.
20% can be written as 20/100.

\(48m\times\frac{20}{100}+48m\)

\(\frac{48m\times20}{100}+48m\)

\(\frac{960m}{100}+48m\)

\(9.6m+48m\)

\({\boxed{57.6m}\)

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