Can someone help me in my questions I m really stuck
Answer: it's a '40.0-kg object, not a 40.4-kg object, which would explain why the answer is different.
Step-by-step explanation:
To find the average add them all up together on a Calculator and divide it by 6
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.
Answer: KJ becuase it is the first two like on but put backwards.
