Question

A car takes 90 minutes to reach the hospital. The odometer of the car shows that
the car has covered a distance of 20 km. What is the speed of the car in km/hr

Answer 1

Answer:

0.75 km per min

Step-by-step explanation:

in km per hour= 15/20 X 60 = 45 kmph. So the speed of car is 45kmph or 0.75 km per min if it covers 15km in 20 minutes.

Answer 2

Answer:

Required speed of the car is 13.3 km/hr.

Step-by-step explanation:

Given,a car takes 90 minutes to reach the hospital.

and it is also given that the car has covered a distance of 20 km.

Here we want to find speed of the car in km/hr.

We know Speed $= \frac{distance}{time}$

For example if a care cover 50 km in 2 hours then speed of the car

$\frac{50}{2} = 25 \: km. {hr}^{ - 1}$

Here total distance covered by car is 20 km and time taken by car is 90 minutes.

So,

distance = 20 km

time = 90 minutes =

$\frac{90}{60} \: hours = \frac{3}{2} \: hours$

Hence request speed

$= \frac{20}{ \frac{3}{2} } \\ = \frac{20 \times 2}{3} \\ = \frac{40}{3} \\ = 13.3 \: km. {hr}^{ - 1}$

This is a problem of Speed and Distance chapter,

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