Start learning 50% faster. Sign in now
Let the actual speed of the car be 'x' km/h ATQ: Or, 60/x - 60/(x + 8) = 2 Or, 2x2 + 16x = 480 Or, x2 + 8x - 240 = 0 Or, x2 + 20x - 12x - 240 = 0 Or, x(x + 20) - 12(x + 20) = 0 Or, (x + 20)(x - 12) = 0 So, x = - 20, and x = 12 As speed cannot be negative So, x = 12 Original speed of the car is 12 km/h
Train P travelling at 50 km/hr crosses another train Q, having three fourth of its length and travelling in opposite direction at 40 km/hr in 14 seconds...
A train 400 m long running at 108 km/hr takes 35 seconds to cross a bridge. The length of the bridge is
Train 'A' takes 36 seconds to pass a boy standing on a platform, moving at a speed of 15 m/sec. The speeds of trains 'A' and 'B' are in the ratio of 5:6...
A train of length 287 m, running at 80 km/h, crosses another train moving in the opposite direction at 37 km/h in 18 seconds. What is the length of the ...
A train takes 18 seconds to cross a platform and 6 seconds to cross a pole. If the length of the train is 70 metres less than the length of the platform...
A person sees a train passing over 3 km long bridge. The length of the train is half that of bridge if the train clears the bridge in 5 mins. What is th...
Time is taken by two trains running in opposite directions to cross a man standing on the platform in 31 seconds and 19 seconds respectively. It took 24...
Train ‘A’ running with a speed of 108 km/hr crosses a vertical pole in 8 seconds. Find the time taken by the train ‘A’ to cross a train ‘B’ ...
Train ‘A’ can cross a pole in 6 seconds and a 120 metre long platform in 12 seconds. If the ratio of length of train ‘A’ and train ‘B’ is 2:...
Two trains C and D started from point A and B respectively. Speed of train D is 21 km/hr more than that of train C. Total distance between point A and B...