Question

The dimensions of a room are 1650 cm × 1350 cm × 900 cm. What should be the size of the longest tape with which the three dimensions can be measured exactly?

• A. 250 cm
• B. 300 cm
• C. 200 cm
• D. 150 cm

Answer 1

Answer:

D. 150 cm

You’re looking for the longest tape length that can measure all three dimensions exactly this is the HCF (Highest Common Factor) of the three numbers.

Dimensions:

• 1650 cm

• 1350 cm

• 900 cm

Step-by-step:

• HCF of 1650 and 1350 = 150

• HCF of 150 and 900 = 150

So, the longest possible tape length is:

150 cm (or 1.5 meters)