state gov DSSSB Junior Assistant, Steno and LDC Mock Test 2023 - 24 Quantitative Aptitude Mensuration Solid Figures
The breadth ‘b’ of a room is twice its height and half of its length. Find the length of the longest diagonal of the room.
1
\(\frac{\sqrt{20} b}{2}\)
2
\(\frac{b}{2}\)
3
\(\frac{\sqrt{21}b}{2}\)
4
\(\frac{\sqrt{19}b}{2}\)