Question
The perimeter of semicircle is 36 cm and the radius of
the semicircle is equal to the height of a Cylinder whose volume is 198 cm 3 . then find the radius of that cylinder.Solution
The perimeter of semicircle = 36 (Ο ΓR) + 2R = 36 22/7 R + 2R = 36 R = 7 cm Hence height of cylinder = 7 cm 
A boat can go 15 km upstream and 21 km downstream in 2 hours. If the speed of the stream is 6km/h, then the time taken (in hours) by the boat to go 21 k...
A boat goes 60 km upstream in 4 hours and 50 km downstream in 2 hours, then the speed of the boat in still water is
A boat moving downstream covers a distance of 200km in 5 hrs as long as to cover the same distance upstream it takes 10hrs. What will be the time taken ...
A boat can cover 150 km in downstream in 15 hours and 120 km in upstream in 12 hours. Find the distance travelled by the boat in still water in 5 hours.
Boat βAβ can cover 160 km in still water in 8 hours. In still water, if the ratio of the speed of boat βAβ to that of βBβ is 4:3 and the spe...
Speed of current is equal to 20% of speed of boat in still water. If the boat takes 4 hours to cover 120 km in still water, then find the time taken by ...
A boat travels downstream and then returns upstream but only up to 60% of the downstream distance. The total journey takes 18 hours. The downstream spee...
The ratio of downstream speed to upstream speed of a boat is 5:3. If the boat can cover 160 km in still water in 10 hours, then find the difference betw...
The speed of a boat downstream is 20% more than the speed of the boat in still water. If the boat can travel 1280 km upstream in 16 hours, then find the...
The speed of the stream is 12 km/h. Boat βAβ covers 160 km distance against the stream in 8 hours and boat βBβ covers 84 km distance against the...
