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Applications of HCF & LCM in Real-World Problems

Estimate the ...

Question

Estimate the total length of the chain.

A

10 cm

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B

15 cm

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C

20 cm

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D

30 cm

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Solution

The correct option is C 20 cm
To estimate the length of the chain we need to add the lengths of both the crayons
11 cm can be rounded off to 10 cm
similarly 8 cm can be rounded off to 10 cm
So total chain length = 10 + 10 = 20 cm

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