Question

please tell me the answer of c1. d2. e4

Answer 1

E 4) formula of square = s*4 =5*4=20km
D 2) rectangle=2(l+b)=2(10+5)=2(15)=30
C 1) formula of triangle =s+s+s=10+12+14=36cm

Answer 2

c.1
the perimeter of triangle = sum of all sides

perimeter = 10+12+14

perimeter = 22+14

perimeter = 36 cm

d.2

perimeter of rectangle = 2(l+b)

perimeter = 2*(10+5)

perimeter = 2*15

perimeter = 30 cm

e.4

perimeter of square = s*s

perimeter = 5*5

perimeter = 25 km 

then, convert in m or cm
25*1000=25000m
          or
25*1000*100=2500000 cm