Answer:
14
Step-by-step explanation:
84/6
66 cm^2
12*6=72 cm^2 and to find the missing pience of the rectangle you multiply 3*2= 6 cm^2.
72 - 6 = 66
a+b/2*h
Here,
a = 12xcm
b= 15xcm
h= 7cm
(12+15)xcm/2*7
=27xcm*3.5
11 / 3 hours