Question
In triangle ABC, DE is drawn parallel to side BC. If AD = 6
cm, DB = 4 cm and AE = 9 cm, then find AC.Solution
ATQ,
A line drawn parallel to one side of a triangle divides the other two sides in the same ratio.
(AD / DB) = (AE / EC)
=> (6 / 4) = (9 / EC)
=> EC = (9 × 4) / 6 = 6 cm
So, AC = AE + EC = 9 + 6 = 15 cm
1, 27, ?, 343, 729, 1331
29    51    95    183    ?     711
5 14 56 220 1125 6786
...55 46 60 41 65 36 ?
20 25 54 165 662 ?
...140Â Â Â Â 300Â Â Â Â 380Â Â Â Â Â 420Â Â Â Â Â 440Â Â Â Â Â ?
...If 4 10 16 26 x 50
Then find the value of (x² - 1) + ( x² + 1).
...720    ?     240     180      144     120
...If  2,  7, 20,  x ,  110,  235,
Then,  7 x + 7√x = ?
6000Â Â Â Â Â Â 3191Â Â Â Â Â Â 5216Â Â Â Â Â Â 3847Â Â Â Â Â Â 4688Â Â Â Â Â Â 4247
6125       a             b  �...