Q. 155.0( 1 Vote )

# In the figure below, some dimensions of a hut have been marked. FindtheÂ other dimensionsÂ (marked ?) of the hut correctly up to one placeof decimal.

Solution:

In right angled ΔPQR,

P = 90°

PQR = 20°

sec θ = hypotenuse / adjacent

sec 20° =
QR / PQ

1.0642 =
QR / 3

QR = 1.0642 × 3

= 3.1926

QR = ST = 3.2 units

In right angled Δ ACD,

cot 42° 6' =

1.1067 =

= 1.66 units

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