Question

13) A submarine is 950 kilometres 2 points
below sea level. At first it
descends 50 kilometres than it
ascends 500 kilometres, due to
the chances of submarine to
reveal its position the captain
descends the submarine 300
kilometres. What is the difference
between new position and initial
position(above or below)?
1750 kilometres below
800 kilometres above
150 kilometres below
150 kilometres above​

Answer 1

initial position = 950 km below

final position = -950 - 50 + 500 - 300 = -800 km = 800 km below

therefore, your answer is  800 km below

Answer 2

Answer:

Total distance = 350 - 100

= 250 m

time = 10 sec

speed = distance / time

= 250 / 10

= 25 m/s

= 90 km/hr