Mathematics
Grade-7
Easy

Question

John reads 1 third  of a book in 1 hour. The book he reads in 2 1 fifth hours is __________.

  1. 11 over 15
  2. 11 over 5
  3. 11 over 20
  4. 1 third

hintHint:

Solve using the unitary method.

The correct answer is: 11 over 15


    STEP BY STEP SOLUTION
    The part of the book read by John in 1 hour = 1 third
    So,
    the part of the book read by him in 2 1 fifth hours =  Part of book read in 1 hour cross times 2 fraction numerator 1 over denominator 5 space end fraction h r s
    = 2 1 fifth space straight x space 1 third
    = 11 over 5 space cross times space 1 third space equals space 11 over 15.
    He wilo read 11 over 15 space p a r t space o f space b o o k space i n space 2 1 fifth h r s.

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