Meghna covered a distance of 15 1/10  k m. Out of this, she covered 5 ¼ km by train, 6 ½  km by bus and the rest by taxi. How many kilometres did she cover by taxi?

let taxi cover distance be x
15 1/10 = 5 1/4 + 6 1/2 + x
151/10 =21/4 + 13/2 + x                  ( LCM)
151/10 -47/4 = x
x = 302 -235/20                                 (LCM)
x=67/20
x=3 7/20
taxi covered 3 7/20 kms
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