A roll of curtain cloth is $25 m$ in length. Three curtains of lengths $3 m 65 c m$ , $2 m 90 c m$ and $6 m 08 c m$ , respectively, are cut from the roll. How much cloth is left in the roll?

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Solution

Step 1: Finding the total length of three curtains cut from the roll
$3 m 65 c m = 3.65 m$
$2 m 90 c m = 2.90 m$ $(∵ 1 c m = 0.01 m)$
$6 m 08 c m = 6.08 m$
Total length of three curtains $= 3.65 + 2.90 + 6.08 m = 12.63$
$3.65 + 2.90 6.08 12.63$
Step 2: Finding the cloth left in the roll
$25 m - 12.63 m = 25.0 m - 12.63 m = 12.37 m$
$25.00 - 12.63 12.37$
$12.37 m = 12 m 37 c m (∵ 1 c m = 0.01 m)$
Hence, the length of the cloth left in the roll is $12 m 37 c m$ .

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