Question

A bus is going southwards at 5m/s. To a man sitting in bus a car appears to move towards west at 2√6 m/s. What is the actual speed of car?
A)4m/s
B)3m/s
C)7m/s
D)None of these​

Answer 1

Answer:

√5^2+2√6^2

so answer will be 7

Explanation:

just take the magnitude of the given velocities

Answer 2

Answer:

$3.8 = 4$

Vcb²=Vcg² + Vbg² -2 Vbg Vcg cosα

here Vcb = vel of car w.r.t the bus

Vbg = vel of bus w.r.t the ground

α = 90

So, vcg²= 5²-(2√6)²

= 25 - 12

Vcg = √13

=3.8=4

i don't know is this right or wrong so if u know the ans tell me pls