A circle is inscribed in a triangle ABC. It touches the sides BC, CA, AB at D, E, F respectively. What is ∠EDF equal to ?

A hollow spherical shell is made up of a metal of density 3 g/cm³. If…

A rectangular paper is 44 cm long and 22 cm wide. Let x be the…

A cone of height 24 cm has a curved surface area 550 cm². What is…

A metal solid cube of side 22 cm is melted to make a cone of…

A conical vessel whose internal radius is 5 cm and height 24 cm is full…