Question

distance ab is 116.4 km long at 7 o'clock, two cars start at the same time and go in opposite directions. Car goes from a with speed 55 km/hr, motorbike goes from b with speed 42 km/hr. What time do the two cars meet?

Answer 1

Answer:

The time taken by the two cars to meet travelling in the opposite directions is:

Explanation:

When both the car and bike are moving in the opposite direction

Let the distance be 's' kilometres

Given,

Speed of car = 55 (x) km/hr

Speed of motorbike = 42 (y) km/hr

Distance A to B is 116.4 km

Relative speed = (x + y) km/hr

The time taken by the car and motorbike to cross each other is calculated as     $t = s (km) / x + y (km/hr)$

$t = 116.4/55+42\\ t =116.4/97\\ t = 1.2$

The car and motorbike will meet in 1 hour 20 mins.

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