The length, , of a garden is 78.5m, correct to the nearest half metre. Correct this statement about the value of

Concept: To get the range, add and subtract one half metre.
t is assumed as  the garden's length of 78.5 metres is accurate to within 0.5 metres.
Consequently, the garden's length range may be expressed as So,
The garden's length is therefore larger than 78 metres and less than 79 metres.
As a result, garden length (), which is accurate up to half a metre, is written as
Hence,the correct option is 1)78,79.