When 78^2 is substracted from the square of a number, the answer is 6460.What is that number?

Report

Report an issue

Name

Email

Message

Submit

Cancel

RRB ASM Exam (Bhubaneshwar) 2009 click here to view all questions

When $78^2$ is substracted from the square of a number, the answer is 6460.What is that number?

A109

B113

C112

D115

All DiscussionsClick here to write answer

Answer is: C [112] Explanation: Let A be the number. Given that $A^2 – 78^2 = 6460$ $⇒ A^2 = 6460 + 78^2$ $⇒ A^2 = 6460 + 6084$ $⇒ A^2 = 12544$ $⇒ A = \sqrt{12544} = 112$ tabish ? answered Jan 12 '2019 at 21:12 All Comments

Post your answers here:

Rich Text Editor, message-ans

Editor toolbarsClipboard/Undo Cut Copy Paste Paste as plain text Paste from Word Undo RedoEditing Spell Check As You TypeLinks Link Unlink AnchorInsert Image Math Table Insert Horizontal Line Insert Special CharacterTools MaximizeDocument SourceBasic Styles Bold Italic Strikethrough Remove FormatParagraph Insert/Remove Numbered List Insert/Remove Bulleted List Decrease Indent Increase Indent Block QuoteStylesStylesStylesFormatFormatabout About CKEditor

Press ALT 0 for help

◢Elements path 

Post

Post your comments here:

Message

140 remaining

Post

Cancel