There are 0.254 decimetres in one inch. There are 12 inches in one foot. Therefore, 2 feet 4 inches is equal to (0.254 x 12 x 2) + (0.254 x 4) = 7.112 decimetres.
There are 3.048 decimetres in one foot. Therefore, 7 feet is equal to 21.336 decimetres.
There are 3.048 decimetres in one foot. Therefore, 5 feet is equal to 5 x 3.048 = 15.24 decimetres.
One foot is equal to 3.048 decimetres. Therefore, 3 feet is equal to 3 x 3.048 = 9.144 decimetres.
There are 3.048 decimetres in one foot. Therefore, rounded to two decimal places, 25 decimetres is equal to 25/3.048 = 8.20 feet.
There are 3.048 decimetres in one foot. Therefore, rounded to two decimal places, 6 decimetres is equal to 6/3.048 = 1.97 feet.
There are 10 decimetres in one metre. Therefore, 4 metres is equal to 4 x 10 = 40 decimetres.
1 metre = 10 decimetres therefore 4 metres = 40 decimetres
There are 10 decimetres in one metre. Therefore, 4 decimetres is equal to 4/10 = 0.4 metres.
There are 100 millimeters in one decimetre. Therefore, 4 millimetres is equal to 4/100 = 0.04 decimetres.
There are 10 decimetres in one metre. Therefore, 0.4 metres is equal to 0.4 x 10 = 4 decimetres.
2.25 feet = 6.858 decimetres.