calculate area of wall
20 x 1.5 = 30 square meters
now calculate area of 1 block
12 x 18 =216 square centimeters
convert cm to meters 1 cm^2 = 0.0001m^2
so 216 x 0.0001 = 0.0216 sq meter for 1 block
divide area of wall by area of block
30/0.0216 = 1388.88 so 1389 blocks are required.
8x-77 would be the answer to this
Answer:
decimal = 1.20527
Step-by-step explanation:




Can you check your question please
(2×3)^2
=6^2
=36
5^2
=25
Yes because it has the multiples of 7&1
Hope this helps