meenao87 meenao87

08-10-2021
Physics

contestada

car moves with a speed of 72 km/hr for 20 minutes and then with the speed of 60 km/hr for 15 minutes. The total distance covered by the car is.........

35 km

36 km

39 km

40 km

Respuesta :

PhucThan PhucThan

08-10-2021

20min=1/3hr
15min=1/4hr
S1=72x1/3=24(km)
S2=60x1/4=15(km)
S1+S2= S=15+24=39

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