A submarine descends from surface of the water at a speed of (30) m per minute. How far the submarine will be from the surface of water after 20 minutes? [ Take the descending distance as a negative integer]

(-50) m

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(-600)m

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(-10) m

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(-200) m

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Solution

The correct option is B (-600)m
The speed of the submarine = (30)m per minute
Since it is descending , take the speed as (-30) m per minute.
The distance covered by the submarine in 20 minutes = $(- 30) \times 20 = (- 600) m$
$∴$ The submarine will be 600 m down from the water surface.

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A submarine descends from surface of the water at a speed of (30) m per minute. How far the submarine will be from the surface of water after 20 minutes? [ Take the descending distance as a negative integer]

The correct option is B (-600)mThe speed of the submarine = (30)m per minute Since it is descending , take the speed as (-30) m per minute. The distance covered by the submarine in 20 minutes = (−30)×20=(−600) m ∴ The submarine will be 600 m down from the water surface.

The correct option is B (-600)m
The speed of the submarine = (30)m per minute
Since it is descending , take the speed as (-30) m per minute.
The distance covered by the submarine in 20 minutes = $(- 30) \times 20 = (- 600) m$
$∴$ The submarine will be 600 m down from the water surface.