Question

Two cars get closer by 9 m every second while travelling in the opposite directie
1m every second while travelling in the same direction. What are the speeds of th
(A) 5 ms- and 4 ms-1
(B) 4 ms-1 and 3 ms-1
(C) 6 ms- and 3 ms-1
(D) 6 ms-1 and 5 ms -1​

Answer 1

Answer:

option (A)..5 m/s and 4m/s

Explanation:

while coming from opposite direction the speeds add up and going towards the same direction subtracts the speed..

here 5+4=9

5-4=1

Answer 2

Answer:

The speed of both cars are 5 m/s and 4 m/s.

(A) is correct option,

Explanation:

Given that,

Distance in opposite direction = 9 m

Distance in same direction = 1 m

Let be the speed of first and second car is x and y.

We need to calculate the speed of both cars

Using formula of relative speed

The relative speed in opposite direction,

$x+y=9$...(I)

The relative speed in same direction,

$x-y=1$....(II)

From equation (I) and (II)

$2x=10$

$x = 5\ m/s$

Now, Put the value of x in equation (I)

$5+y=9$

$y = 4\ m/s$

Hence, The speed of both cars are 5 m/s and 4 m/s.