Question

If a cheetah can travel 120 meters in just 4 seconds, then how many meter can it travel in 25 seconds?

Answer 1

x = 750 m

Explanation:

Write and solve a equation of ratios:

120 m 4 sec

------------- = -------------

x 25 sec

Inverting this equation yields

x 25 sec

-------------- = -------------

120 m 4 sec

Cross-multiplication yields (4 sec)x = (120 m)(25 sec). This yields:

3000 m-sec

x = -------------------- = 750 meters

4 sec

Note that the same result can be obtained by multiplying (120 m) by (25/4).

Answer 2

750 meters

Explanation:

120 meters/4 seconds = 30 meters per second

30 meters per second * 25 seconds = 750 meters

(you could calculate 3 * 25 first to get 75 and then add the zero at the end. It's the faster way.)