求助一道数学题GWD10-10

精灵宝宝

Q10:

A certain quantity is measured on two different scales, the R-scale and the S-scale, that are related linearly.  Measurements on the R-scale of 6 and 24 correspond to measurements on the S-scale of 30 and 60, respectively.  What measurement on the R-scale corresponds to a measurement of 100 on the S-scale?



A. 20

B. 36

C. 48

D. 60

E. 84

Answer: c
这题是啥意思呀？

精灵宝宝

偶懂了~~~