Math, asked by Krithigaa, 25 days ago

the length of the train is 140m and its speed is 72km/hr.how long will it take to cross the following.
a) a pole?
b) a platform of 220m long ​

Answers

Answered by Itzuselessperson
0

Answer:

a) 2800 second

b) 4400 second

Step-by-step explanation:

a)

Speed = 72 km/hr = 20 m/s

Distance = 140 m

  • Time to cross pole = Speed×distance

= 140× 20

= 2800 second

b)

Speed= 20 m/s

Distance = 220 m

Time to cross platform = distance × speed

= 220 × 20

= 4400 sec

Answered by ImpressAgreeable4985
1

Given:

The length of a train is 140m and it's speed is 72km/hr.

Find:

How long will it take to cross. A pole 220m long.

Calculations:

Distance = 220 + 140.

Distance = 360.

Using formula:

Distance/Speed × Time is equal to 1.

⇢ 1000/60

⇢ 72/1

⇢ 7200/60

⇢ 1200/1

⇢ 20/1

⇢ 360/20 × Time = 1

⇢ Time = 18

Therefore, 18 sec is the required answer.

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