A right angled triangle having its base and height equal to 24 cm and 7 cm respectively is rotated by 360∘ along its base. Find the curved surface area of resultant figure.
When a right angled triangled is rotated by 360∘ along its base, it forms a cone.
By Pythagoras theorem, slant height = √ = 25 cm
When triangle rotates around its base, radius will be 7 cm.
So, curved surface area = πrl=227×7 cm×25 cm=550cm2