Lisa can plow 3.5 acres of land in an hour. how long will it take her to plow 2.1 acres of land?
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Lisa can plough 3.5 acres of land in an hour.

So time required to plough 1 acre of land will be 1/3.5 hour

Therefore to plough 2.1 acres of land she will require 2.1 * 1/3.5 or 0.6 hour or 36 minutes

by Level 7 User (26.8k points)

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