Question

A girl uses a rule to measure the length of a metal rod. Because the end of the rulerdamaged, she places one end of the rod at the 1 cm mark as roddamagedend1234567cmHow long is the metal rod?

A) 43 mm
B) 46 mm
C) 53 mm
D) 56 mm

Answer 1

The legnth of metal rod is 53 mm.

Therefore, correct answer is C) 53 mm

Step-by-step explanation:

The girl places one end of the rod at the 1 cm mark on the ruler, and from the damaged end, the rod extends up to the 7 cm mark. Therefore, the length of the rod is the distance from the 1 cm mark to the 7 cm mark, which is 7 cm - 1 cm = 6 cm.

To convert this length to millimeters (1 cm = 10 mm), we multiply by 10: 6 cm * 10 mm/cm = 60 mm. However, since the damaged end starts from 0, we need to subtract the damaged portion (7 mm) from the total length.

So, the correct length of the metal rod is 60 mm - 7 mm = 53 mm, and the correct answer is C) 53 mm.

Therefore, correct answer is C) 53 mm