1.A boat moves downstream at the rate of 8 kmph and upstream at a rate of 5 kmph.
The speed of the boat in still water is?
1. 6 kmph
2. 6.5 kmph
3. 7 kmph
4. 7.5 kmph
2.Mr. Wagle goes to work by a bus. One day he falls asleep when the bus still has
twice as far to go as it has already gone. Halfway through the trip he wakes up as
the bus bounces over some bad potholes. When he finally falls asleep again, the bus
still has half the distance to go that it has already traveled. Fortunately, Mr. Wagle
wakes up at the end of his trip. What portion of the total trip did Mr. Wagle sleep?
Answer : 1.
3.A car travels a certain distance taking 7 hrs in forward journey, during the return
journey increased speed 12km/hr takes the times 5 hrs. What is the distance
1. 210 kms
2. 30 kms
3. 20 kms
4. none of these
4.Answer : 2.
5.A train of length 150 metres takes 40.5 seconds to cross a tunnel of length 300
metres. What is the speed of the train in km/hr?
Answer : 3.
6.A man can row 5 kmph in still water. If the river is running at 1kmph, it takes him 75 minutes to row to a place and back. How far is the place?
(ii) 2.5 km
(iii) 4 km
(iv) 5 km
Answer: Speed downstream = (5+1)km/hr = 6 km/hr Speed upstream = (5-1)km/hr = 4 km/hr Let the required distance be x km x/6 + x/4 = 75/60 2x+3x = 15 x = 3km