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If a ball dropped in a right-triangular object and covers a slanting line (hypotenuse) in 7 second. The object (triangle) ABC has (angle) ABC=30° and CA=45 cm. Find the average speed of the ball |
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Answer» ong>Answer: sinA = AC/CB 1/2 =45/CB CB = 90 average speed = TOTAL distance/ time TAKEN AV = 90/7 average speed = 12.85 m/s |
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