140.37 square units.
42 cm = 16.53543 inches. Don't work in the future with non-SI, obsolete English units.
42
3.5 units, or 3 units (to be pedantic).
4
42 pounds = 19 kilograms
That is 1,198 grams.
16
about 42 in capacity
That is 42 half pints
42 square units
140.4 square units.
42 is 100*42/210 = 20% of 210 but if it is 210' then you need to specify the units for 42 as well.
V = (pi) r2 h = 3.1416 x (42/2 units)2 x 36 units = 49,876 cubic units
Perimeter of PAKE = 42 units so PA + AK + KE + EP = 42 units But, since PAKE is a parallelogram, PA = KE and EP = AK which gives KE + AK + KE + AK = 42 units or AK + KE = 42/2 = 21 units. Now, perimeter of AKE = 33 units that is AK + KE + EA = 33 units But AK + KE = 21 units so 21 + EA = 33 units so EA = 33 - 21 = 12 units.
42 square units.
A cup is a unit of capacity. An ounce is a unit of mass. The two units are therefore incompatible.