Question 135
Find the length of the plank which can be used to measure exactly the lengths 4 m 50 cm, 9 m 90 cm, and 16 m 20 cm in the least time.
Solution
We will have to find the HCF of 4.5, 9.9 and 16.2 metres.
Converting them into cm to get 450, 990 and 1620 cm. HCF of these 3 numbers is 90 cm.
So, the length of the plank which can be used to measure exactly the lengths 4 m 50 cm, 9 m 90 cm, and 16 m 20 cm in the least time is 90 cm.
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