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Evaluate 2532×21318×0.25 - Mathematics

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Question

Evaluate `sqrt(25/32 xx 2 13/18 xx 0.25)`

Sum

Solution

`sqrt(25/32 xx 2 13/18 xx 0.25)`

= `sqrt(25/32 xx 49/18 xx 0.25)`

= `sqrt(25/32 xx 49/18 xx 25/100)`

= `sqrt((25 xx 49 xx 25)/(32 xx 18 xx 100))`

= `sqrt((25 xx 49 xx 1)/(32 xx 18 xx 4)`

= `sqrt((5 xx 5 xx 7 xx 7)/((2 xx 2 xx 2 xx 2 xx 2) xx (2 xx 3 xx 3) xx (2 xx 2)`

= `sqrt((bar(5 xx 5) xx bar(7 xx 7))/(bar(2 xx 2) xx bar(2 xx 2) xx bar(2 xx 2) xx bar(3 xx 3) xx bar(2 xx2)`

= `(5 xx 7)/(2 xx 2 xx 2 xx 3 xx 2)`

= `(35)/(48)`

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Chapter 3: Squares and Square Root - Exercise 3 (A) [Page 38]

APPEARS IN

Selina Concise Mathematics [English] Class 8 ICSE
Chapter 3 Squares and Square Root
Exercise 3 (A) | Q 6.3 | Page 38
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