A submarine is at sea level. At 8.00 p. m it begins to descend at a rate of 8 m per minute. At what time will it be at - 240 m ?

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Solution

8 meter $\to$ 1 min
240 meters $\to$ x mins
$x = \frac{240}{8} = 30$ mins
so 8.30 pm

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A submarine is at sea level. At 8.00 p. m it begins to descend at a rate of 8 m per minute. At what time will it be at - 240 m ?

8 meter → 1 min240 meters → x minsx=2408=30 minsso 8.30 pm

8 meter $\to$ 1 min
240 meters $\to$ x mins
$x = \frac{240}{8} = 30$ mins
so 8.30 pm