Question

on the speedometer of a car there are 130 degrees between 20 mph and 70 mph. how many degrees are there between 30mph and 50mph?

Answer 1

there are 52 degrees between 30 mph and 50 mph

Explanation:

from 20 mph to 70 mph makes 50 mph

so 50 mph have 130 degrees

from 30 mph to 50 mph makes 20 mph

20 mph have ? degrees

let 20 mph have x degrees

thus,

x/130 = 20/50

x = 2/5 * 130 = 52 degrees