Q1. 2 hours after a freight train leaves Delhi a passenger train leaves the same station traveling in the same direction at an average speed of 16 km/hr. After traveling 4 hrs the passenger train overtakes the freight train. The average speed of the freight train was?
a. 30 b. 40 c. 58 d. 60 Q2. A can have a piece of work done in 8 days, B can work three times faster than the A, C can work five times faster than A. How many days will they take to do the work together ? |
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Question no. 1 -None of these
Question no. 2 - b. 8/9
Q2. A can have a piece of work done in 8 days, B can work three times faster than the A, C can work five times faster than A. How many days will they take to do the work together ?
a. 3 days
b. 8/9 days
c. 4 days
d. can't say
here is the ans
A=8 days,B=8/3 days,C=8/5
so total days =(1/8)+(3/8)+(5/8)=9/8 days
Little Star
n/a
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