1. From School No. 15 and School No. 24, which are 153 meters apart, two friends Ivan and Petr started running towards each other at the same time. Ivan's speed is 46 meters per minute. After one and a half minutes of running, they had 24 meters left to run before meeting. What was Petr's speed?
1. 2) $46: 2 \times 3=69$ m - Ivan ran in one and a half minutes;
2) $153-(69+24)=60$ m - the distance that Pete ran;
3) $60: 3 \times 2=40$ m/min - Pete's speed.

Answer: Pete's speed is $40 \mathrm{m} /$ min.