Q41. 
$A$ and $B$ start running simultaneously. $A$ runs from point $P$ to point $Q$ and $B$ from point $Q$ to point $P$. $A$'s speed is 6/5 of $B$'s speed. After crossing $B$, if $A$ takes 5/2 hr to reach $Q$, how much time does $B$ take to reach $P$ after crossing $A$? 
A.  3 hr 6 min 

B.  3 hr 16 min 

C.  3 hr 26 min 

D.  3 hr 36 min 
Q42. 
Walking at 3/4 of his usual place, a man reaches his office 20 minute late. Find his usual time? 
A.  2 hr 

B.  1 hr 

C.  3 hr 

D.  1.5 hr 
Q43. 
A jet plane is rising vertically with a velocity of 10 m/s. It has reached a certain height when the pilot drops a coin, which takes 4 sec to hit the ground. Assuming that there is no resistance to the motion of the coin, the height of the place and the velocity of the coin on impact with the ground are: 
A.  38.4 m, 28.7 m/s 

B.  38.4 m, 29.2 m/s 

C.  26.5 m, 13.5 m/s 

D.  26.5 m, 28.7 m/s 