Question
If +42 represents 42m above the water surface, what does each of the following represent: [4 MARKS]
(i) −87+55
(ii) +98−115
(ii) +36+57−73
(iv) −42−23+39
(i) −87+55
(ii) +98−115
(ii) +36+57−73
(iv) −42−23+39
Answer:
:
Each point: 1 Mark
(i) −87+55=−32
⇒32mbelow the water surface
(ii) +98−115=−17
⇒17mbelow the water surface
(ii) +36+57−73=20
⇒20mabove the water surface
(iv) −42−23+39=−26
⇒26mbelow the water surface
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:
Each point: 1 Mark
(i) −87+55=−32
⇒32mbelow the water surface
(ii) +98−115=−17
⇒17mbelow the water surface
(ii) +36+57−73=20
⇒20mabove the water surface
(iv) −42−23+39=−26
⇒26mbelow the water surface
Was this answer helpful ?
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