A person covers a distance in 12 minutes. If runs at a speed of 12 km per hour on an average. Find the speed at which he must run to reduce the time of journey to 5 minutes. Choose the correct choice from the following:
A) 8 m/s	B) 4 m/s	C) 15 m/s	D) 10 m/s	E) 5 m/s
Explanation:   T = 12 m   Spees = 12 kmph   = 12 x 5/18 = 10/3 m/s   Let new speed be "x"   12 x (10/3) = 5x   x = 8 m/s   8 m/snswer: Option 8 m/s
<result>A</result>
A person covers a distance in 12 minutes. If runs at a speed of 12 km per hour on an average. Find the speed at which he must run to reduce the time of journey to 5 minutes.