Question

Andy takes 6 hours and Brinda takes 4 hours to read a book. Both started reading copies of the book at the same time. After how many hours is the number of pages to be read by Andy , twice that to be read by Brinda ? Assume Andy and Brinda read all the pages with constant pace.
(A) 1 (B) 2 (C) 3 (D) 4

Answer 1

Pls Help! @Zale101

Answer 2

@Will.H

Answer 3

@ShadowLegendX

Answer 4

@agent0smith

Answer 5

@KJSaif

Answer 6

@zepdrix

Answer 7

@inkyvoyd

Answer 8

Am I correct in my approach,
Let 'x' be the number of hours took andy to read twice that brinda
Then number of pages read in an hour by
Andy =1/6 of a book in an hour.
Brinda= 1/4 of a book in an hour.
Given question is . After how many hours is the number of pages to be read by Andy , twice that to be read by Brinda.
(1/6)*x=2*(1/4)
x=3 hours

Answer 9

No your answer is wrong
if you subsitute x = 3 in the expression you made you will get \
0.5 = 0.5
you said Andy should read twice Brinda
that didn't happen here
here they both read the same amount

actually the whole question don't make any sense
Let the number of pages x
Andy takes 6 hrs so 6x
Brinda takes 4 hrs so 4x

2(6x) = 4x
12x = 8x
See if x = 1 will solve the equation (for the equation to be solved the left side must be twice the right side)
12 = 8
Since 12 is not twice the 8 then x = 1 is not the solution
See if x = 2 will be the solution
12x = 8x
24 = 16
24 is not twice 16 so x= 2 is also not the solution
See if x = 3 will be the solution
12x = 8x
36 = 24
also not the solution

let’s see the last option
12x = 8x
48 = 32

None of the options makes sense
And to me even the question doesn’t make sense.

Answer 10

none of the above should have been a choice and it would have been the right choice

Answer 11

There is a phrase in the question that I htink is the source of the confusion:
" to be read ".

This means (IMO) thee number of pages LEFT to read

After 3 hours
Andy has read 3/6 and has 1/2 LEFT to read

After 3 hours
Brinda has read 3/4 and has 1/4 LEFT to read

Answer 12

Thank you guys with your help finally i got the correct approach as well as answer.