Question

A and b starting from the same place at the same time are at a distance of 218 kms after driving for 4 hours in the opposite direction.If a speed is 2.5km/h more than b what is b speed

Answer 1

Answer:

26 km/hr

Step-by-step explanation:

Let the speed of B be x km/hr

∴  speed of A = x + 2.5 km/hr [ speed of A is 2.5km/h more than B]

When they are travelling in opposite direction

Distance travelled by A = Speed x Time

                                       = (x + 2.5) x 4

Distance Travelled by B = Speed x Time

                                        = 4x

Total distance travelled by both = 218

∴ (2.5 + x) x 4 + 4x = 218

10 + 4x + 4x = 218

8x = 208

x = 26

Hence speed of B is 26 km/hr