add converter mps to kph

src/convert_kph_to_mps.c

@@ -3,4 +3,9 @@
 double converter_kph_to_mps(double kph){
     double speed = kph / 3.6;
     return speed;
+}
+
+double converter_mps_to_kph(double mps){
+    double speed = mps * 3.6;
+    return speed;
 }

src/convert_kph_to_mps.h

@@ -2,5 +2,6 @@
 #define THEADMIRALS_CONVERT_KPH_TO_MPS_H
 
 double converter_kph_to_mps(double kph);
+double converter_mps_to_kph(double mps);
 
 #endif //THEADMIRALS_CONVERT_KPH_TO_MPS_H