Question
Train A running with a sped of 90 km/h crosses a
vertical pole in 9 seconds. Speed of train A is 5 m/s less than speed of train B, and length of train B is 50 metres less than length of train A. Find the time taken by train B to cross a 290 metre long tunnel.Solution
Speed of train A = 90 × 5/18 = 25 m/s Speed of train B = 30 m/s Length of train A = 25 × 9 = 225 metres Length of train B = 225 – 50 = 175 metres Desired time = (175 + 290)/30 = 15.5 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.
What is the function of the "IF" function in Excel?
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.
