self Maths Puzzle

A man in a train travelling at 30km/hr notices that a train going in the opposite direction passes him in 9 sec.If the length of this train is 200m find its speed .

Read Solution (Total 2)

relative speed of trains = 200/9 mtrs/sec = 200*18/(9*5)= 80 km/hr
speed of 2nd train = 80-30=50 km/hr
11 years agoHelpfull: Yes(4) No(0)

Ans 50 km/hr
If speed of the train=x, then relative speed=x+30 km/hr
0.2/(x+30) =9/3600 or x+30=80
So x=50 km/hr
11 years agoHelpfull: Yes(1) No(1)

self Other Question

In the following question, four similar sentences are given, of which only one isgrammatically correct, stylistically elegant and semantically consistent.
Option A Stumped by the poor response to his efforts aimed at controlling money supply andliquidity, the Finance Minister has announced a slew of stern measuresto rein in inflation.
B Embittered at the poor response to his efforts aimed at controlling money supply and liquidity,the Finance Minister has announced a slew of stern measures torein in inflation.
C Furious at the poor response to his efforts aimed at controlling money supply and liquidity, theFinance Minister has announced a slew of stern measures tocontrol inflation.
D Disappointed by the poor response to his efforts aimed at controlling money supply andliquidity, the Finance Minister has announced a slew of stern measuresto rein in inflation. if
2345 =62
6571 =73
then
8355 =?