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(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 busactually travels in east direction, its speed is -(A) 24 km/h(B) 23 km/h(C) 26 km/h(D) 30 km/h​

Answer»

24 km/ hrExplanation: 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



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