maths3

Q: the scale of a map is 1 cm to 200m.
1] write the scale in the form 1 : x .
1cm：200m
= 1cm：200x100cm
= 1：20000

2] what is the actual length of a road, which measures 15 cm on hte map?
actual length of a road = 15x200
= 3000m

3] what is the length of a highway on the map if its actual length is 8 km.
8km / 20000
= 8x1000x100 / 20000
= 40cm

4]a rectongular football count measure 5mm x 12mm on the map what is its
actual area ?
5mm x 20000 = 100m
12mm x 20000 = 240m
actual area = 100x240 = 24000m2

1) 1:200000

2) 3000000cm=3000m=3km

3) 5cm

4) 120000cm2=120m2