Proportional problem
John drove 60 miles in 2 hours. If he continues to drive at this same speed, how long will it take him to drive 40 additional miles?

answer:

1.20 minutes

Step-by-step explanation:

60 divided by 2 = 30

30= 30 mph

40 miles

40 - 30 = 10

10 miles

10 miles at 30 mph is 20 minutes

it takes 10 minutes to go 5 miles at 30 mph

i got u homie ;)

(n^3 - n)

= n(n-1)(n+1)

since it is divisible by 3 and 2 ,because it is a multiple 3 consecutive number

if, n-1 is odd then n+1 is also odd, then it is a multiple of 9

but if, n-1 is even then n+1 is also even, then it is a multiple of 4

so, largest multiple = max(9*2, 4*3) = max(18, 12) = 18