Question

If a car takes 18 minutes to complete its journey at the speed of 70 km / h , how long would it take to travel the same distance if its speed is increased to 84 km/h​

Answer 1

Answer:

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Answer 2

Answer:

15 minutes.

Step-by-step explanation:

In the first case

$distance = speed \: \times time$

= 70 Km/h × 18 min.

$= \frac{70 \times 18}{60} \: km$

= 21 Km

In the second case

$time \: taken = \frac{distance}{speed}$

$= \frac{21 \: km}{84 \: km {h}^{ - 1} }$

$= \frac{1}{4} hour$

$= \frac{1}{4} \times 60 \: minute$

= 15 minutes. Ans