Question
A goods train leaves a station at a certain time and at
a fixed speed. After 10 hours, an express train leaves the same station and moves in the same direction at a uniform speed of 204 km/hr, this train catches up the goods train in 7 hours. Find the speed of the goods train.Solution
Let the speed of the goods train be ‘s’ km/hr Distance covered by goods train in 17 hrs = s x 17 km Distance covered by express train in 7 hrs = 7 x 204 km Distance covered by goods train in 17 hrs = Distance covered by express train in 7 hrs So, 17s = 7 × 204 ⇒ 17s = 1428 ⇒ s = 1428/17 = 84 So, Speed of goods train = 84 km/hr
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.
