Question

If Amrutha entered the lift at the ground floor of a building, then which of the following situations can be represented by -3 + (-1)?
(Ground floor is taken as '0' and going down is represented by - ve)

• A. She went one floor down, and then went two floors down.
• B. She went three floors up and then went one more floor up.
• C. She went three floors down and then went one more floor down.
• D. She went three floors down, and then went one floor up.

Answer 1

The correct option is C

She went three floors down and then went one more floor down.

The ground floor of the building corresponds to the number zero.
Amrutha going three floors down, and then one more floor down, corresponds to -3 + (-1).
Her going one floor down, and then two floors down is to be represented by -1 + (-2).
Her going three floors up, and then one more floor up is represented by 3 + 1.

And, her going three floors down, and then one floor up is represented by -3 + 1.