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सी.आई.एस.सी.ई.आयसीएसई ICSE Class 7

Find a Number Whose One-third Part Exceeds Its One-fifth Part by 20. - Mathematics

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प्रश्न

Find a number whose one-third part exceeds its one-fifth part by 20.

बेरीज
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उत्तर

Let the number = x

According to the condition

`1/3"x" - 1/5"x" = 20`

`=> ("5x - 3x")/15 = 20`  ...(LCM of 3, and 5 = 15)

`=> "2x"/15 = 20`

`=> "x" = (20 xx 15)/2`

`=> "x" = 150`

∴ Number = 150

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पाठ 12: Simple Linear Equations (Including Word Problems) - Exercise 12 (D)

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सेलिना Concise Mathematics [English] Class 7 ICSE
पाठ 12 Simple Linear Equations (Including Word Problems)
Exercise 12 (D) | Q 6
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