Final answer:
To find the length of her friend's garden, add 2 cm and 98 cm to Celia's garden length (15 m 24 cm), resulting in a total length of 16 m 24 cm for the friend's garden.
Step-by-step explanation:
The question asks us to determine the length of a friend's garden given the length of Celia's garden and the additional length of the friend's garden.
Celia's garden is 15 m 24 cm in length. Her friend's garden is 2 cm and 98 cm longer than Celia's garden. To find the total length of her friend's garden, we first add the lengths in centimeters: 24 cm (Celia's garden's length in cm) + 2 cm + 98 cm = 124 cm. We convert 124 cm to meters and centimeters since 100 cm equals 1 m. There are 1 m 24 cm in 124 cm. Now, we add this to the original 15 m from Celia’s garden length: 15 m + 1 m = 16 m. So, the friend's garden is 16 m 24 cm in length.