A and B can complete a work in 15 days and 10 days respectively. They starteddoing the work together, but after 2 days B had to leave and A alone completedthe remaining work. The whole work was completed in

Report

Report an issue

Name

Email

Message

Submit

Cancel

RRB GG Exam (Bhopal) 2009 click here to view all questions

A and B can complete a work in 15 days and 10 days respectively. They started doing the work together, but after 2 days B had to leave and A alone completed the remaining work. The whole work was completed in

A10 days

B8 days

C12 days

D15 days

All DiscussionsClick here to write answer

Correct answer is: 12 days Explanation: The work completed by both in 2 days is $2\big(\frac{ 1}{15} + \frac{1}{10}\big) = \frac{1}{3}.$ Work done by A alone is $\frac{2}{3}$ For full work A needs 15 days For 2/3 work the days needed is $(\frac{2}{3})\times15$ = 10 days. The work was completed in 10 +2 = 12 days. prakash ? answered Dec 18 '2019 at 9:8 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