Question

Q.10) A train of length 800 m is running at a speed of 60 km/hr. How much time will it take to pass a tunnel of length 200 m? 1) 1 minute 2) 6 minute 3) 2 minute 4) 7 minute
Q.11) Expenditure of a trip for 25 students is Rs.625. What will be expenditure for 40 students ? 1)rs 2000 2) rs1000 3)rs 725 4) rs1025
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Answer 1

Answer:

10) ANSWER

Let the length of the tunnel be 'x' m

Time = (Length of train + Length of tunnel) / speed

[ speed in meter/second = 78 *5 / 18 = 65/3 m3sec ]

Therefore, 60 = (800 + x) / (65/3)

60 *65 = 2400 + 3x

x = (3900 - 2400) / 3 = 500 meters

So, answer is 500 meters.

Step-by-step explanation:

11) question was wrong