A7. A triathlon competition consists of $1 \mathrm{~km}$ of swimming, $24 \mathrm{~km}$ of cycling, and $6 \mathrm{~km}$ of running. Peter completed the swimming in 20 minutes. He cycled at ten times the speed he swam, and ran at four times the speed he swam. If he started the competition at 9:30, he arrived at the finish line at:
(A) 10:56
(B) 11:00
(C) 11:04
(D) 11:08
(E) 11:12
A7. Peter swims $1 \mathrm{~km}$ in $20 \mathrm{~min}$, cycles $1 \mathrm{~km}$ in $2 \mathrm{~min}$, and runs $1 \mathrm{~km}$ in $5 \mathrm{~min}$. In the competition, he spent $20 \mathrm{~min}$ for $1 \mathrm{~km}$ of swimming, $48 \mathrm{~min}$ for $24 \mathrm{~km}$ of cycling, and $30 \mathrm{~min}$ for $6 \mathrm{~km}$ of running, totaling $98 \mathrm{~min}$. If he started the competition at 9:30, he arrived at the finish line at 11:08.