This solution explains how to calculate Priyanka's speed in kilometers per hour (km/hr) based on the distance she covers and the time taken. We will break down the problem into simple steps.
We are given the following details:
The goal is to find the speed in km/hr.
To find the speed in km/hr, we first need to convert the given distance from meters (m) to kilometers (km) and the time from minutes to hours (hr).
We know that 1 kilometer is equal to 1000 meters. To convert meters to kilometers, we divide the distance in meters by 1000.
Distance in km = $\frac{\text{Distance in m}}{1000}$
Distance in km = $\frac{800}{1000}$ km
Distance in km = 0.8 km
We know that 1 hour is equal to 60 minutes. To convert minutes to hours, we divide the time in minutes by 60.
Time in hr = $\frac{\text{Time in minutes}}{60}$
Time in hr = $\frac{6}{60}$ hr
Time in hr = $\frac{1}{10}$ hr = 0.1 hr
The formula for speed is:
Speed = $\frac{\text{Distance}}{\text{Time}}$
Now, we can substitute the converted values into the formula:
Speed = $\frac{0.8 \text{ km}}{0.1 \text{ hr}}$
Speed = 8 km/hr
After converting the distance to kilometers and the time to hours, we calculated the speed using the standard formula. The result shows that Priyanka's speed is 8 km/hr.
With a certain set of diameters, a tractor's front wheels make 2 revolutions (revs) for every 1 revolution of the rear wheels. The effect of changing wheel diameter(s) is shown in the following plot. 
In this context, which of the following statements is CORRECT?
A car covers 4 successive stretches of 3 km each at speed of 10 kmph, 20 kmph, 30 kmph and 60 kmph respectively. The average speed of the car for the entire journey is: