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06-01-2018
Mathematics

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in the diagram,ABCD is the cover of a book with length 30 cm and breadth 18 cm.Find the length of the diagonal AC.Give your answer correct to one decimal place

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06-01-2018

According to Pythagoras theorem : a^2+b^2=c^2
30^2+18^2=c^2
900+324=c^2
1224=c^2
sqrt root of 1224=c
34.9=c

Ac=34.9cm

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