Indian Institute of Technology Kanpur (IIT-K) 2006 JT - Question Paper

 '"
"
"

 
 


=
+


   &(
 4"6-"&(
&(
 $ 

    &(
 ! " 
 

 
8&  (
+
-

 ! " ---"+

 
 
  
 
8&   (
+
+ -


 
 
 
 
8 &  (
+
´ +


 

8"
" )
-
 5-" ""+"")
(112) F-"+11
 "-
" "
")
 % ""&A(
Q:113 Laila drives to the station every day to pick up her husband Majnu, who usually arrives on a train at 6
o’clock. Last Monday, Majnu finished work earlier, caught an earlier train and arrived at the station at
5 o’clock. He started to walk home and eventually met Laila who drove him the rest of the way,
getting home 20 minutes earlier than usual. On Tuesday, he again finished early and obtained himself at
the station at 5:30. Again he began to walk home, again he met Laila on the way, and she drove him
home the rest of the way. presume constant speed throughout with no wasted time for waiting, backing
of the car etc. How much earlier than the usual time were they home on Tuesday?
(A) six minutes (B) eight minutes (C) 10 minutes (D) 12 minutes
Solution 113 : 
 
 
 '-"'" "
A"")
 &H ?@-"
R">(
 2-""#"-->"#'--

"-


R+"#''#)
 07
?@-"#1-+"8R">1))
<

>

-"?@-"'#""+
"+7R#
?@-<
"<

)
 &H ?@-"
<(
 '""+
 + 25)
6
30 5
5 1
5
(6 : 00 five : 30) = = ´
+
- ´ 
 0 
<

"#)"+"#

" 5''5"



 )
 2" "-
"-"--)
 %""&#()

Earning:   Approval pending.