Question

(39.) A bus appears to go with a speed of 25 km/hr to a car
driver, driving at the rate 7 km/hr northwards. If the bus
actually travels in east direction, its speed is -
(A) 24 km/h
(B) 23 km/h
(C) 26 km/h
(D) 30 km/h​

Answer 1

Answer:

24 km/ hr

Explanation:

Relative velocity of bus with respect to car ( Vbc) = 25 km/hr

Velocity of car in north direction ( Vc) = 7 km/hr

using vector law ,

Vbc^2 = Vb^2 + Vc^2

(25)^2 = (Vb)^2 + (7)^2

Vb = square root 576

so Vb = 24 km/hr