Question

Raina climbs up 5 stairs every second and then climbs down 2 stare or over the next second how many seconds will it take to climb 60 stairs

Answer 1

12 seconds will be taken

Answer 2

in every 3sec. she climbs 3 stairs ( 5 up and then 2 down ) so it means she climbs 1 stair per sec. .
so she will take 60 sec.