A car is running at a speed of 64 km/h to cover a certain distance in 40 min. At what speed should the car run into reduce the time of the journey to 30 min ?
Answer & explanation
Correct answer: option 1
Distance = Speed × Time
= 64 × \(\frac{40 }{60 }\)
= 42.667 km
To cover the distance in 30 min ,
Speed = \(\frac{Distance }{Time}\)
= \(\frac{42.667 }{30}\) × 60
= 85.33 km/h