1,620
14
The old Imperial ruler was one foot long. To enable pupils to carry one in their "pencil box", a version that was half as long was introduced. 1 foot = 30.48 cm so rulers are graduated to 30 cm or half that length (= 15 cm).
The perimeter of a 12 cm x 3 cm rectangle is 2*(12+3) cm = 2*15 cm = 30 cm.The perimeter of a 12 cm x 3 cm rectangle is 2*(12+3) cm = 2*15 cm = 30 cm.The perimeter of a 12 cm x 3 cm rectangle is 2*(12+3) cm = 2*15 cm = 30 cm.The perimeter of a 12 cm x 3 cm rectangle is 2*(12+3) cm = 2*15 cm = 30 cm.
12.
15 cm long and 5 cm wide is pretty nearly 15 cm long.
A small measures 15 cm .It is 15 cm long . It means 2 small ruler will be equal to 30 cm and 5 cm of 3rd ruler . It is 35 cm long .
It is: 15 mm = 1.5 cm
It is: 30*15*12 = 5400 cubic cm
15 centimeters is 5.91 inches.
1 standard ruler =15 cm . 90 cm =90/15 . =6 standard ruler .
I am guessing it is 7 to 15 cm long
15 cm^2
This is so simple: 2 x (28 + 15) = 86 cm.
10 cm wide and 15 cm long
each side would be 15 cm long.
I am guessing it is 7 to 15 cm long