Mathematics for IGCSE & O level - Proportion (Section 1 - No. 29)
The time, *t*, taken for a journey at a fixed speed is inversely proportional to the number of people, *n*, travelling. If *t* = 10 hours when *n* = 5, what is the formula?
t = 50n
t = 2n
t = 50/n
t = 2/n
説明
t = k/n. 10 = k/5, k = 50. Thus, t=50/n