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 50 x 30)/(50 + 30) Average speed = (2 x 50 x 30)/80 = 37.5 km/hr
The total area of a circle and a square is 5450 cm2; the diameter of the circle is 70 cm, what is the difference between the circumference of...
A right circular cylinder having total surface area of 2710.4 cm2 is immersed in a vessel completely filled with water. If the height of the ...
If ∆ ABC~∆ FDE such that AB = 9 cm, AC = 11 cm, DF = 16 cm and DE = 12 cm, then the length of BC is:
The volume and height of a cylinder are 4224 cm3 and 21 cm. Find the radius of the cylinder.
In what time would a Cistern be filled by three pipes whose diameter are 2cm, 8/3 cm and 4cm running together, where the largest pipe alone fill it in 1...
A right circular cone has a height that is double its radius, and its volume is measured at 2,250π cm³. If the radius is reduced to one-third and the ...
The area of the largest circle, that can be drawn inside a rectangle with sides 100 cm by 91 cm, is:
Find the mean proportion between (6 + √8) and (3 – √2).
A giant circular wheel has a diameter of 21 metres. In how many revolutions will the wheel cover a total of 16.5 km?
A square is converted into a rectangle by increasing its length by 50 % and decreasing its width by 20%. Which of the following statements is true?
