Archive
20th of March 2017
Mathematics
Q:

10 BOYS TAKE 12 HOURS TO DIG A WELL ,HOW MUCH TIME WILL 8 BOYS TAKE TO DO THE SAME ?

Nissi.rakesh - CBSE - Class VI

Monday, March 20, 2017 at 12:59:PM

A:

Let the number of hours taken by 8 boys be x.

Number of boys 10 8
Number of hours 12 x

Since the more less boys work, the more time it will take.

begin mathsize 12px style 10 over 8 equals straight x over 12
rightwards double arrow straight x equals fraction numerator 10 cross times 12 over denominator 8 end fraction
rightwards double arrow straight x equals 15 space hours
Hence comma space 8 space boys space will space take space 15 space hours space to space do space the space same space work. end style

Monday, March 20, 2017 at 14:45:PM