Question

A journey by car takes 54 minutes at 60 km/hr. How fast must the car go to finish the journey in 40 minutes?

Answer 1

Answer:

speed = distance/time

60= d/(54/60)

distance, d=54

new speed= 54/(40/60)=81

Answer 2

Answer:

Answer:T=54 min

Answer:T=54 minS=60 km/h

Answer:T=54 minS=60 km/hD=S×T

Answer:T=54 minS=60 km/hD=S×TD=60×54

Answer:T=54 minS=60 km/hD=S×TD=60×54New Time= 40 min

Answer:T=54 minS=60 km/hD=S×TD=60×54New Time= 40 minNew Speed= D/Time

Answer:T=54 minS=60 km/hD=S×TD=60×54New Time= 40 minNew Speed= D/Time =D×1/T

Answer:T=54 minS=60 km/hD=S×TD=60×54New Time= 40 minNew Speed= D/Time =D×1/T =68 km/h

Step-by-step explanation:

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