trap
A fell in a trap,tried to get out but...................................................................................................... the trap is 3 meter deep. A is 1.5 meter high, his hands can reach to 2 meter. normally his climbing speed is 1m/1s but he feel dizzy when he reached the bottom of the trap, his speed is only 1m/2s now. he ran to the side of the trap and made a jump. he is 1 meter to the bottom now. he rested for one minute and every minute he rest he would slide down 0.5 meter. his speed would be half every meter he climbed.(reset when he back to the bottom of the trap). when he is climbing, his body bend and he is only 1m high. he can use his muscle for 4s and then he needs a break for 1s, every outbreak counts 2s (outbreak:he suddenly jump from from the side, the first second he would slide down 0.5m and then he can reach 2m high, he must rest for 3s after that ). How many seconds did he use from when he is on the side of the trap until he could reach the height of the ground
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1 solution
1s: jump, 1m to bottom, slide down 0.5m----------------------------------------------------- 2s: 0.5m up----------------------------------------------------------------------------------------- 3s: 0.5m up----------------------------------------------------------------------------------------- 4s: ready for outbreak, slide down 0.5 m----------------------------------------------------- 5s: reached the height of the ground(first second does not count in the 4s)-----------