How many triangles are there in the following figure?
In the given circle, chord \(\overline{AB}\) is extended to meet the tangent at \(\overline{DE}\) at D. If \(\overline{AB}\)= 10 cm and \(\overline{DE}\)=12 cm, what is the length of BD?
If m men can do \( \frac{1}{n} \) of a piece of work in p days, find the expression for the number of persons required to do the whole work in q days.
\( \frac{mn}{pq} \)
\( \frac{mp}{nq} \)
\( \frac{mnp}{q} \)
\( \frac{mnq}{p} \)
Evaluate: 42x {(2 + 3) - 11}