Since the distance travelled by a boy (going to school and coming back from school) is equal. So, average speed = 2xy/(x + y) Average speed = (2 x 70 x 30)/(70 + 30) Average speed = (2 x 70 x 30)/100 = 42 km/hr
A cylindrical tank has a height of 12 meters and a radius of 7 meters. If 50% of the tank is filled with water, what is the volume of water in the tank ...
A rectangular park with length and breadth of 13 m and 19 m, is surrounded by a path of 3 m wide. Find the area of the path.
If the numerical value of the circumference of a circle is half the numerical value of its area, then the radius of the circle is:
The perimeter of a rectangle is 50% more than perimeter of a square of side 25 cm. If the length of rectangle is 100% more than side of square then fin...
A right circular cylinder having diameter 21 cm & height 38 cm is full of ice cream. The ice cream is to be filled in cones of height 12 cm and diameter...
In an exam of 100 marks, the average marks of a class of 38 students are 72. If the top 3 scorers of the class leave, the average score falls “dow...
Each side of square ‘A’ is 7 cm less than that of square ‘B’. The perimeter of a rectangle is 5 times the difference of the perimeters of the tw...
Find how many cubes of side 10 cm each can be made by melting a cuboid with dimensions 90cm × 120cm × 150cm?
The volume of the cylinder is 12320 cm3 is less than the volume of the sphere. The radius of the sphere is 2.625 times the height of the cyli...
