the cost of a pen is 10.5 if the price of a book is 5.1 times that of a pen find the cost of 10 books
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Step-by-step explanation:
Let the cost of 1 book be Rs x
Price of book = 5.1 × cost of a pen.
x = 5.1 × 10.5=53.55 Rs.
Price of 1 book = 53.55 Rs.
Price of 10 books = 53.55 × 10 = 535.5 Rs.
Cost of 10 books = 535.5 Rs.
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