Answer:
648 sq units
Step-by-step explanation:
Area of the base= 12×12= 144 sq. units
Perimeter of the base=4×12= 48
Total surface area= 1/2×48×21 + 144
=648 sq units
Answer:

Step-by-step explanation:
The standard form:

A, B and C are the integer.
We have:

Find the common denomintaor of given fractions.
We have 5, 4 and 2. The common denominator of 2, 4 and 5 is 20.
20 = 2 · 10 = 4 · 5 = 5 · 4
Thereofre multiply both sides by 20:

Answer:
1200
Step-by-step explanation:
4x6= 24
24x 5= 120
120x 10= 1200