The ratio between the speeds of two Bullet trains is 7: 8. If the second Bullet train runs 440 kms in 5 hours, then the speed of the first train is:
Choose the most appropriate option:
A) 89.25 km/hr.
B) 77 km/hr.
C) 90.25 km/hr.
D) 94.25 km/hr.
E) 96.25 km/hr.
Let the speed of two bullet trains be 7x and 8x km/hr.   Then, 8x = (440/5)= 
<gadget id="calculator">(440/5)</gadget>
<output>88</output>
88   x= (88/8)= 
<gadget id="calculator">(88/8)</gadget>
<output>11</output>
11   Hence, speed of first bullet train= (7 x 11) km/hr = 77 km/hr.   77 km/hr.
<result>B</result>
The ratio between the speeds of two Bullet trains is 7: 8. If the second Bullet train runs 440 kms in 5 hours, then the speed of the first train is: