if train a and train b goes in opposite direction of each other and interchange their place after crossing each other.find the speed of train b if the both train took 9 and 16 hours respectively and speed of train a is 10km/h

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Solution

Train a takes 9hour with speed 10 km/h
distance = 109 km = 90 km

time taken by train b = 16 h for same distance
speed of b = (90/16) km/h
speed of b = 45/8 km/h
speed of b = 5.625 km/h

by equation methods
910 = 16*x
x = 90/16. Km/h
x = 5.625 km/h.

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if train a and train b goes in opposite direction of each other and interchange their place after crossing each other.find the speed of train b if the both train took 9 and 16 hours respectively and speed of train a is 10km/h

Train a takes 9hour with speed 10 km/h distance = 10*9 km = 90 km time taken by train b = 16 h for same distance speed of b = (90/16) km/h speed of b = 45/8 km/h speed of b = 5.625 km/h by equation methods 9*10 = 16*x x = 90/16. Km/h x = 5.625 km/h.

Train a takes 9hour with speed 10 km/h
distance = 109 km = 90 km

time taken by train b = 16 h for same distance
speed of b = (90/16) km/h
speed of b = 45/8 km/h
speed of b = 5.625 km/h

by equation methods
910 = 16*x
x = 90/16. Km/h
x = 5.625 km/h.