Question

the elevator in an office building starts at ground level and goes up at a speed of 6 feet per second for 7.5 second then it goes down at a speed of 10 feet per second for 8 seconds what is the elevators elevation now

Answer 1

when it is going up

$x=16\cdot7.5=120$

so when it stops, it has a elevation of 120 feet

$x=120-10\cdot8=40$

so the final elevation is 40 feet