Multiple choice

A room 18 metres and 42 cm long and 15 metres and 35 cm wide, is to be paved with minimum number of square tiles. The number of tiles needed is

  1. 15

  2. 30

  3. 21

  4. 18

  5. 16
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

It is correct answer.Solution:Maximum size of square tile = HCF of 15.35 and 18.42 = 3.07No. of tiles = (18.42 * 15.35)/(3.07 * 3.07) = 30

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