Question

Two cars A and B are approaching each other head-on with speeds 20 m/s and 10 m/s respectively. When their separation is X then A and B start braking at 4 m/s and 2m/s respectively. Minimum value of X to avoid collision is (1) 60 m (2) 75 m (3) 80 m (4) 90 m

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Answer 1

Two cars are approaching each other at an equal speed of 7.2 km/hr. When they see each other, both blow horns having frequency of 676 Hz.

Answer 2

Answer:

two cars are approaching each other at an equal speed of 7.2 km/hr when they see each other both blow horns having frequency of 676 Hz

Explanation:

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