Question
A man goes downstream with a boat to some destination
and returns upstream to his original place in 6 hours. If the speed of the boat in still water and the stream is 10km/h and 4km/h respectively, the distance of the destination from the starting place is.Solution
Let the speed of boat in still water =B and speed of stream =S B=10km/h, S=4km/h B+S=14km/h B-S=6km/h Let Distance =D km D/14+D/6=6 10D=252 D=25.2km
There is a rectangular paper, whose length and breadth are in the ratio 12:11, respectively and it has a perimeter of 92 metres. If a triangular piece w...
A cylinder has a radius of 4 cm and a height of 10 cm. A cone with the same radius is placed inside the cylinder, touching the bottom and the sides. If ...
Find out the volume of a tetrahedron whose side is 6√2 cm³ ?
The angle of elevation of the top of a tower from a point on ground which is 30 mtrs. away from the foot of the tower is 30°. Height of the tower is:
If cot x – tan x = 3/2, then what will be the value of cot x + tan x?
The sum of the perimeters of a square and a rectangle is 118 metres. If the sum of the length and breadth of the rectangle is 33 cm, then find the area ...
The length of a rectangle is 5 metres more than its width. If the perimeter of the rectangle is 62 metres then what is the area (in m2Â ) of ...
Inside a square land having perimeter equal to 68 metres, leaving aside a circular land of radius 7 metres, the remaining land needs to be levelled at a...
The base of a triangle is 18 cm and height is 12 cm. The height of another triangle of double the area having the base 24 cm is:
Find the area of the triangle ABC. Where AC=17cm, AB=15cm, BC=8cm
Relevant for Exams:
