3780lbs
12ft by 21ft is equal to 4m by 7m or 28 square meters.
Physically, yes, but I would be really worried about its braking ability because of the weight.
No. Seven yards equal 21ft. 1 yd = 3 ft 7yd x 3ft/yd = 21ft
640.08 cm
21 feet is 7 yards.
21 feet = 6.4008 metres
38
21ft
294
That would be 63 square feet
17.7ft
There are 3 feet in a yard so 7yds = 21ft