Question

car travels 70 kilometres in 30 minutes find the speed in kilometre per hour​

Answer 1

Answer: 140km/h

Step-by-step explanation: car tavels 70 km

car travels 70 km in : 30 min.              

                                 = 1/2 hour

speed of car = distance/time

                    = 70/1/2

                    = 140km/h

Answer 2

Answer:

$distance \: covered \: in \: \frac{1}{2} \: hrs = 70 \\ distance \: covered \: in \: 1hr = 70 \times \frac{2}{1} \\ \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: = 140 \\ \\ speed = \frac{distace}{time} \\ \: \: \: \: \: \: \: \: \: \: \: \: = \frac{140}{1} \\ \: \: \: \: \: \: \: \: \: \: \: \: = 140km \: per \: hr$

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