quantitative reasoning Flashcards
1 mile
1.6 km
1 kg is how many pounds
2.2
1 cm is how many inches
0.4
how many cards are there in a deck
52
how many weeks are there in a year
52
%change formula
difference/original
Calculate how much the original speed has to increase in order to reach a certain total distance in a certain time.
Treadmills allow people to exercise by running and walking without leaving their houses.
A runner intends to run for 30 minutes and cover a distance of 6 km.
She runs at a steady speed of 10.5 kilometres per hour for the first 12 minutes, and sees she is going to have to speed up in order to complete the distance in the time she has set for herself.
By how much does this runner have to increase her speed to complete the 6 km workout in the target time?
- find distance already travelled
- find remaining distance and remaining time
- find speed required
- subtract original to find amount to increase
and: 2.5 kmh
A person travels 1/3rd of his journey at a speed of 3mph, the next 1/3rd at a speed of 5mph and the final 1/3rd at a speed of 15mph. What is his average speed over the whole trip?
5 mph