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If a car covers 400 m distance with the speed of 36 km/hr and a truck covers 8 km with the speed of 40 m/sec, then find the sum of their times.
1. 240 min.
2. 240 hours
3. 240 sec.
4. 360 se.

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Best answer
Correct Answer - Option 3 : 240 sec.

Given:

Distance covered by car = 400 m

Speed of car = 36 km/hr.

Distance covered by Truck = 8 km

Speed of truck = 40 m/sec.

Formula used:

Speed = Distancee/Time

1 km = 1000 m

1 hr. = 3600 sec.

Calculations:

Time taken by car

⇒ 36 km/hr = 400 m/T1

⇒ 36 × (5/18) = 400m /T1

⇒ T1 = 400/10

⇒ T1 = 40 sec.

Time is taken by truck

⇒ 40 m/sec. = 8 km/T2

⇒ 40 m/sec. = 8000 m/T2

⇒ T2 = 8000/40

⇒ T2 = 200 sec.

⇒ Sum of times = T1 + T2

⇒ Sum of times = 40 sec. + 200 sec.

⇒ Sum of times = 240 sec.

∴ The sum of the times is 240 sec.

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