P and Q take part in 400 m race. P runs at 12 km/hr. P gives Q a start of 20 m and still beats him by 13 seconds. The speed of Q is: (Round up to two decimal places.)
A
10.87 km/hr
B
10.29 km/hr
C
11.38 km/hr
D
11.61 km/hr
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Question: P and Q take part in 400 m race. P runs at 12 km/h... - PrepLeague