Question

A scale distance of 3 centimeters on a map represents an actual distance of 51 feet.

Answer 1

In this case, the best way to work this out is to find what 1cm is equal to. In this case, you have to divide 51/3, giving you 17. You know that 17 feet. You can now divide 187/17, giving you 11. Therefore, 11cm is equal to 187 feet. Hope this helps

Answer 2

If the distance is 51 feet in 3 cm
if the destance is 187 feet ..?cm 
51 ....3
187...? =3 * 187/51
           =3*3.58
           =10.74 cm (hope it help)