Question
The ratio of age of βBβ after 5 years from now and
age of βCβ 4 years ago from now is 7:4, respectively. The present age of βCβ is 50% of the present age of βAβ. If present age of βAβ is 72 years then find the present age of βBβ.Solution
Present age of βCβ = 0.5 Γ 72 = 36 years 4 years ago from now, age of βCβ = 36 β 4 = 32 years 5 years hence from now, age of βBβ = 32 Γ (7/4) = 56 years Present age of βBβ = 56 β 5 = 51 years
A boat can travel 30 km downstream in 2 hours and 18 km upstream in 3 hours. How much time (in hours) will it take to travel 21 km in still water?
A man can row one quarters of a kilometer against the stream in 30/4 minutes and return in 5/2 minutes. The speed of the man in still water is:
A swimmer swims from point P against the current for 6 minutes and then swims back along the current for the next 6 minutes and reaches point Q. If the ...
A man can row at 5 kmph in still water. If the velocity of current is 1 kmph and it takes him 5 hour to row to a place and come back, how far is the place?
The speed of a boat in still water is 200% higher than the speed of stream. If the boat takes 4 hours to cover 96 km downstream, find the time it will t...
The speed of boat downstream and upstream is 28 km/hr and 18 km/hr respectively. Time taken to travel a distance of (m + 35) km downstream and (n + 22) ...
Speed of a boat in still water to speed of boat in upstream is 11:7. If the boat can travel 300 km in downstream in 5 hours, then find the time taken by...
A man can row one quarters of a kilometer against the stream in 30/4 minutes and return in 5/2 minutes. The speed of the man in still water is:
The ratio of the speed of boats βAβ and βBβ in still water is 8:9, respectively. The speed of the current is 25% of the speed of boat βAβ in...
A boat can cover 145 km in downstream in 5 hours and 144 km in upstream in 8 hours. Find the speed of boat in still water.