Shota is a dangerous fellow who likes to go rock climbing in active volcanoes. One time, when he was 30
meters below the edge of a volcano, he heard some rumbling, so he decided to climb up out of there as quickly as he could. He climbed up at a constant rate. After 4.5 seconds, he was 7.5 meters below the edge of the volcano.
How fast did Shota climb?

Question

Shota is a dangerous fellow who likes to go rock climbing in active volcanoes. One time, when he was 30
 meters below the edge of a volcano, he heard some rumbling, so he decided to climb up out of there as quickly as he could. He climbed up at a constant rate. After 4.5 seconds, he was 7.5 meters below the edge of the volcano.
How fast did Shota climb?

Mercury · Answer

old question, answering to close

speed = distance/time.

he started at -30m and climbed up to -7.5m. subtract -7.5m - (-30)m to get the distance. divide this by 4.5 seconds to get the speed.