Q.The ratio of speeds of a motor boat to that of the current of water is 36 : 5. The motor boat, goes along with the current in 5 h 10 min. Find the time to come back of motor boat.
A) 5 hr 50 min
B) 6 hr
C) 6 hr 50 min
D) 12 hr 10 min
Related Questions
Q.
The ratio of speeds of a motor boat to that of the current of water is 36 : 5. The motor boat, goes along with the current in 5 h 10 min. Find the time to come back of motor boat.
A) 5 hr 50 min
B) 6 hr
C) 6 hr 50 min
D) 12 hr 10 min
Q.
The speed of a boat in still water is 15 km/hr. It can go 30 km upstream and return downstream to the original point in 4 hrs 30 min. The speed of the stream is:
A) 8 km/hr
B) 5 km/hr
C) 10 km/hr
D) 15 km/hr/
Q.
A boat goes 24 km downstream in 10 hours. It takes 2 hours more to cover the same distance against the stream. What is the speed of the boat in still water?
A) 2 km/hr
B) 2.8 km/hr
C) 4 km/hr
D) 2.2 km/hr
Today's Challenging Question
Q.
Ajay & Bimal can do a price of work in 10 days, Bimal & Chetan can do in 15 days and Chetan and Ajay in 20 days. They work together for 6 days and then Ajay leaves and now Bimal & Chetan work together for 4 more days. If Bimal leaves, how long will Chetan take to finish the work?
A) 12 days
B) 10 days
C) 16 days
D) none 3 members solved
Solve Challenging question
Q.
Ajay & Bimal can do a price of work in 10 days, Bimal & Chetan can do in 15 days and Chetan and Ajay in 20 days. They work together for 6 days and then Ajay leaves and now Bimal & Chetan work together for 4 more days. If Bimal leaves, how long will Chetan take to finish the work?
A) 12 days
B) 10 days
C) 16 days
D) none
Correct Answer: 6 hr 50 min
Solution:
The speed of boat=36x
speed of stream=5x
speed of downstream=36x+5x=41x and upstream=36x-5x=31x
Distance covered downstream=41x(5+10/60)=41x*(31/6)
Upstream time=\(\frac{41x*31}{6*31x} =\frac{41}{6}\)
=6hr 50 mins