Question
The base of a pyramid is an equilateral triangle whose
each side is 10 cm. Its slant edge is 30 cm. What is the total surface area (in cm²) of the pyramid?Solution
Speed of a boat in still water to speed of boat in upstream is 11: 9. If the boat can travel 260 km in downstream in 10 hours, then find the time taken ...
To go 75 km downstream, a boat takes 5 hours. For the same 75 km upstream, it takes 10 hours more than that. What is the boat’s still-water speed?
A man can row upstream at 18 km/hr and downstream at 24 km/hr. Find the man’s rate in still water and the rate of the current.
...A man rows a boat a certain distance downstream in 9 hours, while it takes 18 hours to row the same distance upstream. How many hours will it take him t...
A man can go on a motorboat with a speed of 18 km/hour in still water to a certain upstream point and return to the starting point in a river that flows...
The speed of a boat in still water is 15 km/h and the speed of the stream is 3 km/h. Find the time taken to travel 54 km downstream.
A ship, when moving against the current, can travel a distance of 240 km in 8 hours. If the ship's speed in calm waters is 40 km/hr, how many hours will...
Speed of a boat in still water is 9 km/hr. It goes 12 km downstream and comes back to the starting point in three hours. What is the speed of water in t...
A motorboat covers 600 km downstream in 25 hours. If it can cover 240 km in still water in 12 hours, then find the time taken by the boat to cover 840 ...
The time taken by a boat to travel 'd' kilometers downstream is 8 hours, while the time taken to travel (d - 60) kilometers upstr...
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