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Practicing Success
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In ΔABC, points E and F are on sides AB and AC respectively such that 4 AE = 3AB and 3AF= 3AC. If BC = 20 cm, then what is the length of EF (in cm) ? |
10 12 15 18 |
15 |
4 AE = 3AB AE : AB = 3 : 4 and 4AF= 3AC AF : AC = 3 : 4 Similarly , EF : BC = 3 : 4 According to question, 4R = 20 1R = 5 EF = 3R = 3 × 5 = 15 The correct answer is option (3) : 15 |
