Related Questions

A boat has a crack in its bull which is leaking water into the boat and could pump which can pump the water out in 8 hours . If the boat is 168 km away from the shore and the pump is running what is the minimum speed the boat should run at so that it can reach the shore before sinking?
A 5km./hour
B 6 km/hour
C 7 km/hour
D 8km/hour
The ratio of the speed of boat in still water to the speed of stream is 16 :5. A boat goes 16.5 km in 45 minute upstream. Find the time taken by boat to cover the distance of 175 km downstream.
A 30minutes
B 25minutes
C 50minutes
D 45minutes
The ratio of the speed of boat in still water to the speed of stream is 16: 5. A boat goes 16.5 km in 45 minute upstream . Find the time taken by boat to cover the distance of 17.5 km downstream .
A 30 minutes
B 25 minutes
C 50 minutes
D 45 minutes
The ratio of the speed of boat in still water to the speed of stream is 16 : 5. A boat goes 16.5 km in 45 minute upstream , find the time taken by boat to cover the distance of 17.5 km downstream .
A 30 minutes
B 25minutes
C 50 minutes
D 45 minutes
স্থির পানির উপর ভাসমান নৌকা হতে একজন বালক অনুভূমিক দিকে লাফ দিয়ে তীরে পৌঁছাল। নৌকার এবং বালকের ভর যথাক্রমে 200 kg এবং 50kg। বালকের বেগ 20 m/s হলে, নৌকার পশ্চাৎ বেগ কত? (A boy jumps horizontally from a boat floating on stationary water and reaches the shore. The mass of the boat and the boy are 200 kg and 50 kg respectively. If the velocity of the boy is 20 m/s, what is the recoil velocity of the boat?)
A 5.0 m/s
B 7.5 m/s
C 9.0 m/s
D 6.5 m/s
Choose the one which can be substituted for the given expression : A professional rider in horse races.
A Rider
B Horse courser
C Jockey
D Coach
Balding is much more common among white males "than males of other races"
A than among males of other races
B than other races males.
C than it among males of other races .
D than males of the others races
Mongoloid races are characterised by
A Prognathism
B Epicanthic fold
C Dolico cephalic head
D None of these
The subject that deals with the regional distribution of human races and their history is called
A Biogeography
B Ethnography
C Cartography
D Paleontology
If a boat goes 7km upstream in 42 minutes and the speed of the stream is 3kmph,then the speed of the boat in still water is-
A 4.2 km/hr
B 9km/hr
C 13km/hr
D 21km/hr

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