Question
A man rows upstream 60 km and downstream 36 km taking
12 hours each. Find the speed of current.         ÂSolution
Distance upstream= 60 km, time taken to row upstream = 12  hrs. Speed upstream = 60/12  = 5 km/hr. Distance downstream= 36 km, Time taken to row downstream = 12  hrs. Speed downstream =  36 /12  = 3 km/hr. Speed of the current = (5 – 3) * ½ = 1 kmph
Perimeter of square is 48 cm and length of a rectangle is equal to side of square and breadth of rectangle is 4 cm less than length of the rectangle. F...
The perimeter of a rectangle is 120% more than perimeter of a square of side 10 cm. If the length of rectangle is 250% more than side of square then fin...
The total area of a square and a rectangle is 306 cm². The breadth of the rectangle is 6 cm more than the length of each side of the square. If the len...
Two-thirds of the cylinder is full of water. When we tilt the cylinder in such a way that the water becomes a diagonal shape, in this process 93.5 liter...
A cuboidal room has a length of 28 metres and a width of 16 metres. The volume of air in the room is 2240 cubic metres. What will be the cost of paintin...
A rectangular piece of copper foil of length 56 cm and area 616 cm2 is folded along its width to form a cylinder such that there is only one ...
- The volume of a sphere is 3888 cm³. Calculate the surface area (in cm²) of the sphere. [Use π = 3]
If base of a pyramid is square of side 3 cm & height is 21cm . What is the volume of pyramid?
The diameter of the base of a cylindrical vessel is 20 cm and its height is 35 cm. Find its curved surface area (in cm²).
On a rectangular wall of length 20 metres and height 15 metres, there is a window in the shape of triangle surmounted on a square. If the base of triang...
Relevant for Exams:
