Answer:
It's surface area is 1257.14cm^2
Step-by-step explanation:
area=22/7×20cm×20cm
=3.14×20cm×20cm
=1257.14cm^2
Number Two or B would be correct
Answer:

Step-by-step explanation:
see the attached figure to better understand the problem
In the right triangle ABC
Applying the Pythagorean Theorem

substitute the given values

solve for BC


