Question

HELP!!
If 7 students can finish 1001 puzzles in 429 minutes, how long does it take 3 students to work out 1001 puzzles in the same speed?

Answer 1

use chain rule

Answer 2

?

Answer 3

Ah, hm, this wouldn't appear difficult, but I feel a trap door here.

Answer 4

I'll help you.

Answer 5

now use chain rule to find x

Answer 6

if 7 students take 429 minutes to do a work then obivously, 3 students take more than 429 minutes.
so when students decreases , time increases(so it's inverse proportion)

Answer 7

Use the Men/Time/Work formula:
Combination of direct and inverse relation
m1*t1*w2=m2*t2*w1