self Maths Puzzle

16) A car crosses a man walking at 6 km/h. The man can see the things up to 450m only in one direction due to fog. He sees the car which was going in the same direction for 4.5min. What is the speed of the car?
A) 9kmph
B) 12kmph
C) 12.5kmph
D) 15kmph

Read Solution (Total 2)

ANSWER : 12kmph

SOLUTION :

Man speed = 6km/h = 100m/min
Since both car and man were moving so relative speed = 450m/4.5min

Let assume car speed be x
So,
x-100 = 450/4.5
Or, x = 200
so Speed of car = 200m/min = 12km/h
13 years agoHelpfull: Yes(3) No(0)

options wrong ans =6
13 years agoHelpfull: Yes(0) No(1)

self Other Question

15) A number is such that when it is multiplied by 8 , it gives another which is as much above from 270as the original (itself) is below 270. The average of the original number and the resultant number is
A) 33.75
B) 190
C) Cannot be determined
D) 270
17) A person sold two cows . each for rs 9900 . if he gained 10% on one and lost 20% on the other , then which of the following is true?
A) He gained rs1500
B) He lost rs 200
C) He lost rs1575
D) None of the above