for the first question 1. ( 5cm / 2km ) = ( xcm / 5km ) 5*5 = 2x 25 = 2x 12,5cm = x 2. similar to (1) but having x as the km and 2 as the cm 5x = 2*2 x = 0,8 km 3. 192:2 to find the ratio of 1 cm to multiply by the length of the map 96*8.125=780cm 4. the are is (base*length)/2 use the same logic of (3) to find the real length of base 5*96=480cm so for the the area (480*780)/2= 187200cm^2
