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Question

If +42 represents 42m above the water surface, what does each of the following represent: [4 MARKS]

(i) 87+55

(ii) +98115

(ii) +36+5773

(iv) 4223+39

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Solution

Each point: 1 Mark

(i) 87+55=32
32m below the water surface


(ii) +98115=17
17m below the water surface


(ii) +36+5773=20
20m above the water surface


(iv) 4223+39=26
26m below the water surface


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