A train 130 m long passes a bridge in 21 seconds moving with a speed of 90 km/hr. Find the length of bridge.A395mB540mC485mD750mAnswer: A. 395mRead Explanation:90 x 5/18= (130+length of bridge)/21 25=(130+x)/21 25 x 21 =130+x 525=130+x x=525-130=395Open explanation in App