Question
A train can cross a pole, a bridge of 800 meter long and
platform of 750 meter long in 13 seconds, _____ seconds and 28 seconds, respectively. The value given in which of the following option will fill the blank to make the above statement true:Solution
Let the length of the train = x meter So according to question: x/13 = (x + 750)/28 28x = 13x + 9750 15x = 9750 x = 650 So the length of the train = 650 m Speed of the train = 650/13 = 50 m/s Time taken by the train to cross a bridge 800 meter long = (650 + 800)/50 = 1450/50 = 29 seconds
A cone has a base radius of 6 cm and a height of 8 cm. Find its volume and slant height (use π = 3.14).
120Â Â 124Â Â 151Â Â 167Â Â Â 292Â Â Â ?
Factor the polynomial: x³ - 6x² + 11x - 6.
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The simplified value of (452 x 452 x 452 – 356 x 356 x 356)/(452 x 356 + 452 x 452 + 356 x 356) is:
A bag contains 8 black and 10 white balls. One ball is drawn at random. What is the probability that the ball drawn is white?
In the figure, ABCD is a cyclic quadrilateral with O as center of the circle If ∠BOC = 136°, find ∠OBC.
