On a map whose scale is 1:50000 ,a wood is represented by a region of area 6 平方厘米.State the corresponding area on a map

On a map whose scale is 1:50000 ,a wood is represented by a region of area 6 平方厘米.State the corresponding area on a map whose scale is 1:25000
After modification a car will do 25% more miles to the gallon.Calculate the resulting percentage saving in fuel for a given journey.
翻译就可以