Question

21. A car covered a distance of 85 m in 35 seconds,
Find the speed of the car.
(A) 87.4 km/h (B) 80 km/h
(C) 89.7 km/h (D) All of these
(E) None of these

give answer with explanation ​

Answer 1

Answer:

Required speed is 8.74 km/hr .

So, option E is the correct answer.

Explanation:

Given, a car covered a distance of 85 m in 35 seconds

So, distance = 85 m

and time = 35 secs

We know,

Distance = Speed × Time

For example, If speed of a car is 20 m/s and the car travel 60 s then the car cover total distance $= 20 \times 60 = 1200 \: m$

Here,

According to question,

Speed

$= \frac{distance}{time} \\ = \frac{85}{35} \\ = 2.4286 \: m. {sec}^{ - 1}$ = 2.4286 × (18/5) km/hr = 8.74 km/hr

So, speed of the car is 8.74 km/hr

Extra information:

The formula speed = distance ÷ time can be rearranged like any other equation. The formula can be rearranged in three ways: speed = distance ÷ time. distance = speed × time.

This is a problem of Speed and Distance chapter,

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