Question

Vidushi drives at 50 km per hour and starts her journey at 4:00 a.m. Vidhu drives at 60 km per hour and starts his Journey at 5:30 a.m. and follows Vidushi . at what time will Vidhu Cross Vidhushi​

Answer 1

Answer:at 1:01 pm

Step-by-step explanation:

At 1:00 pm

Both travel equal distance i.e. 450 kms

7.5 *60 = 450

9*50 is 450

Answer 2

At 2 : 30 pm, Vidhu Cross Vidhushi​

Solution:

Vidushi drives at 50 km per hour and starts her journey at 4:00 a.m

Speed = 50 km/hr

Let time = t

Then,

$distance = speed \times time \\\\d_1 = 50 \times t\\\\d_1 = 50t$

Vidhu drives at 60 km per hour and starts his Journey at 5:30 a.m

5 : 30 am - 4 am = 1 .5 hour

Let time = t - 1.5

Then,

$d_2 = 60 \times (t-1.5)$

They meet when,

$d_1 = d_2\\\\50t = 60 \times (t - 1.5) \\\\5t = 6t - 9\\\\t = 9$

Thus they meet 9 hours after Vidu started

At what time will Vidhu Cross Vidhushi​

5 : 30 am + 9 hours = 2 : 30 pm

Thus at 2 : 30 pm, Vidhu Cross Vidhushi​

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Two trains of length 200 m and 250 m respectively are running in opposite direction on parallel tracks. if their speed be 45 km per hour and 50 km per hour respectively, in what time will they cross each other?​

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