Question

A car runs at a speed of 90km/hr. What distance does it cover in 50 minutes?​

Answer 1

Easy way:

Easy way:First, since there are 60 min. in an hr, divide 90 km/hr by 60 to get km/min. To make the division easy, drop the zero off both 90 & 60 (essentially dividing both by 10). Now you have 9/6 which is 1.5 km/min.

Easy way:First, since there are 60 min. in an hr, divide 90 km/hr by 60 to get km/min. To make the division easy, drop the zero off both 90 & 60 (essentially dividing both by 10). Now you have 9/6 which is 1.5 km/min.Next: 20 sec. is 1/3 of a minute so in 1/3 min you travel 1/3 of 1.5, or 0.5 km in 20 seconds.

Easy way:First, since there are 60 min. in an hr, divide 90 km/hr by 60 to get km/min. To make the division easy, drop the zero off both 90 & 60 (essentially dividing both by 10). Now you have 9/6 which is 1.5 km/min.Next: 20 sec. is 1/3 of a minute so in 1/3 min you travel 1/3 of 1.5, or 0.5 km in 20 seconds.Conveniently these values lended themselves well to easy arithmetic. Obviously that is not always the case. However, if you just want an approximate answer, you can do the math in your head by rounding the beginning numbers to convenient numbers that are close to their value.

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Mark Brilliant

$\huge\red{\ddot\smile}$

Answer 2

Answer:

Here if the car is travelling at 90km/hr means it is covering 90 km in 60 minutes as 1 hr=60 minutes.

Now, you want to calculate distance covered in 50 minutes so,

90km=60 min

x. = 50 min

To calculate x just cross multiply like,

x= 50*90/60

x= 75 km.

the vehicle will cover 75 km.