1) RADHIKA BOUGHT 6 BOOKS FOR RS. 450. WHAT IS THE 9 COST OF BOOKS? 2) STEP 1:FIRST FIND THE COST OF 1 BOOK THEN FIND THE COST 9 BOOKS. 3) COST OF 1 BOOK = 450/6 = RS. 75 4) STEP 2:MULTIPLY THE COST OF 1 BOOK INTO 9. 5) COST OF 9 BOOKS = 75*9 = RS. 675 6) THIS IS CALLED UNITARY METHOD

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