Step-by-step explanation:
4/10 = 40/100 = 400/1000
If simplified they ALL equal 4/10ths.
Answer:
It's surface area is 1257.14cm^2
area=22/7×20cm×20cm
=3.14×20cm×20cm
=1257.14cm^2
https://www.symbolab.com/solver/simplify-calculator/simplify%203%5Csqrt%7B7%7D%20-%205%5Csqrt%7B7%7D
thats the answer kid