A right angle triangle of base 4 cm and height 3 cm is rotated about its height. The curved surface area and volume of the solid obtained are _____ (incm2) and _____ (incm3) respectively.
A
18π&14π
No worries! We‘ve got your back. Try BYJU‘S free classes today!
B
20π&16π
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
C
16π&18π
No worries! We‘ve got your back. Try BYJU‘S free classes today!
D
22π&20π
No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution
The correct option is B20π&16π As we rotate a right angle triangle about its height we get a cone.
Its radius = r = Base of the triangle = 4 cm
and, height = h= 3 cm
By Pythagoras' theorem; Hypotenuse =√base2+height2=√42+32=5cm