Question

The projection of a line on a co-ordinate axes are 2, 3, 6. Then the length of the line is

• A. 7
• B. 5
• C. 1
• D. 11

Answer 1

Answer: (A)

7

Answer 2

ratio $\frac{\lambda}{1}$ = $–\frac{x_{1}}{x_{2}}$ = $\frac{–3}{–2}$ = $\frac{3}{2}$

\ Required co-ordinates

= $\left( \frac{6–6}{5},\frac{10 + 3}{5},\frac{–14 + 24}{5} \right)$= $\left( 0,\frac{13}{5},2 \right)$