JEE Main Physics question

A car moves a distance of 200 m. It covers first half of the distance at speed 60 kmh and the second half at speed . If the average speed is 40 kmh, the value of is [Kerala PET 2011]

• (A)60 kmh
• (B)30 kmhCorrect
• (C)13 kmh
• (D)40 kmh