[单选题]
A jumper in the long-jump goes p1emr* dk+fq 6iwekl,;t wqcpxp 3r520 u 07twtnto the jump with a speed of 12 m/s at an angle of wt 5t,0l 2kp0 rw3wu xq;eptc7$20^{\circ}$ above the horizontal. How far does the jumper jump?
A. $6.14 \; m$
B. $8.22 \; m$
C. $9.45 \; m$
D. $10.4 \; m$
E. $12.28 \; m$
Post time 2025-9-8 22:24:32