Mathematical Aptitude MCQ - Time and Distance
Let distance be D
With speed 30km/hr he is 20 minutes late
With speed 45 km/hr he is 8 minutes late
∴ Difference between two time
= 20 - 8 = 12min = 12/60 hours
T = D/S
∴ D/30 - D/45 = 12/60
∴ D = 18km
With speed 30km/hr he is 20 minutes late
With speed 45 km/hr he is 8 minutes late
∴ Difference between two time
= 20 - 8 = 12min = 12/60 hours
T = D/S
∴ D/30 - D/45 = 12/60
∴ D = 18km
Distance is same
∴ S1 × T1 = S2 × T2
∴ 24 X 6/60 = S2 X 8/60
To convert minutes to hours, divide minutes by 60
∴ S2 = 18 km/hr
∴ S1 × T1 = S2 × T2
∴ 24 X 6/60 = S2 X 8/60
To convert minutes to hours, divide minutes by 60
∴ S2 = 18 km/hr
Speed of the man in still water = 12 km/hr
Speed of the stream = 3 km/hr
Speed downstream = (12 + 3) = 15 km/hr
Speed upstream = (12 – 3) = 9 km/hr
Let the distance travelled be ‘d’ km Then
Speed of the stream = 3 km/hr
Speed downstream = (12 + 3) = 15 km/hr
Speed upstream = (12 – 3) = 9 km/hr
Let the distance travelled be ‘d’ km Then
