In a 100 m race, A runs at 8 km per hour. If A gives B a start of 4m and still beats him by 15 seconds, find the speed of B in m/sec.
1
\(3 \frac{7}{15} \mathrm{~m} / \mathrm{sec} \)
2
\(3 \frac{1}{15} \mathrm{~m} / \mathrm{sec} \)
3
\(3 \frac{2}{15} \mathrm{~m} / \mathrm{sec} \)
4
\(\frac{8}{5} \mathrm{~m} / \mathrm{sec}\)