Book Maths Puzzle

the average area of 7 halls is 55m^2
find the area of the 8th hall when average of 8 halls s 58m^2

Read Solution (Total 2)

area of 7 halls = 7*55*55 =21175
area of 8 halls = 8*58*58 =26912
area of 8th hall =26912-21175=5737
i.e 75.74m^2
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area of 8 halls = 58*8=464m^2
area of 7 halls = 55*7=385m^2
area of 8th hall= 464-385=79m^2
11 years agoHelpfull: Yes(0) No(0)

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