If a car covers 400 m distance with the speed of 36 km/hr and a truck

1.	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 hours3. 240 sec.4. 360 se.
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.

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 hours3. 240 sec.4. 360 se.

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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