Question

Q 31 Namit is riding at a speed of 20 m/s. How much time will he take to cross a 0.38 km long bridge?
Ops: A.
O 19 seconds
B.
15 seconds
a
с.
23 seconds
20 seconds​

Answer 1

Answer:

A 19 seconds is the answer

Answer 2

Answer:

Namit will take 19 seconds to cross a 0.38Km long bridge if he is riding with speed 20m/s.

Therefore, the option (A) is correct.  

Step-by-step explanation:

Given, the length of the bridge = 0.38Km

Convert the distance from km into meters:

1km = 1000m

∴ Distance = 0.38×1000m= 380m

The speed at which Namit is riding = 20m/s

We know that the speed is the distance travelled in per unit time.

Speed = Distance /Time

Time = (Distance travelled)/speed

Namit took time to cross the bridge $=\frac{380m}{20ms^{-1} } =19sec$

Therefore, Namit will take 19 seconds to cross the bridge of length 0.38Km.