1. SA = P*L/2. As it's a square pyramid, P = 7*4 = 28 yd and SA = 28*4/2 = 28*2 = 56 sq yd.
2. SA = 2B+ph
B = area of the base (3*7 = 21), p = perimeter of the base (6+14=20), h = height (2)
==> 2B+ph = 42+22 = 64 sq. ft
3. SA = (Perimeter of the base × Length of the prism) + (2 × Base Area) = 32+10 * 16 + 2 * 80 = 32 + 160 + 160 = 320 + 32 = 352 sq. cm
4. SA = 6l^2 = 6*64 = 384 sq. in
5. Analogue to 1, SA = (7*4*5)/2 = (28*5)/2 = 14*5 = 70
