Question

A submarine began at sea level and descended toward the ocean floor at a rate of −0.015 km per minute. Its final depth was −0.3675 km. Estimate how long it took the submarine to reach its final depth by rounding the dividend and divisor to the nearest hundredth.

Answer 1

Answer:

submarine began at sea level and descended toward the ocean floor at a rate of ?0.015 km per minute. Its final depth was ?0.3675 km. Estimate how long it took the submarine to reach its final depth by rounding the dividend and divisor to the nearest hundredth. Estimate of the dividend: Estimate of the divisor: Estimate of the quotient

Answer 2

It took approximately 1472 seconds for the submarine to reach its final depth.

Given,

Velocity of submarine = -0.015km/minute

Displacement to cover = -0.3675 km

To Find,

Time is taken to reach the final depth

Solution,

We can simply solve this numerical by following this process.

According to physics,

Distance = Speed x Time

Time = Distance/Speed

Here, the velocity of the submarine is with a negative sign, which means the submarine is going downwards.

And, displacement is in a negative sign, which means distance is in the downward direction.

So, Time = 0.3675/0.015 minutes

Here, time will be in minutes because speed is in km/minute.

So, on simplifying to the nearest hundredth, we get,

Time = 0.368/0.015 minutes

Time = 24.533 minutes (equation 1)

But the SI unit of time is in seconds, so our final answer will be in seconds.

1 minute = 60 seconds

Multiply equation 1 with 60 seconds, 24.5333 x 60 seconds

The final answer is that it took nearly 1472 seconds for the submarine to reach its final depth.

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