Question

A submarine moved from the water surface at a speed of (- 20) metre per minute. how far is the submarine from the water surface at the end of 7 minutes ?

Hint: consider the water surface level as zero

Answer 1

Here is your answer by SmArTY SUjeET YAdUVAnShI,,,
Given that,
A submarine moved from the water surface at speed=-20
so 7 minutes the water surface=-20*7=-140metre
that's all

Answer 2

Answer:

- 140                                                                                                                            Step-by-step explanation:

Speed of submarine= - 20

∴ at the end of 7 minutes= - 20 * 7= -140