Question

A car moves with a speed of 90 km/h for 30 minutes.
a) Find the speed of the car in m/s.
b) Find the distance covered by the car in km.

Write with full explanation

Answer 1

a) 90×5/18

= 25 m/s

b) d= speed x time ( t= 1800

= 25×1800

= 45000 m/s

= 45000/1000

= 45 km/sec

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Answer 2

$\huge\purple{Required \: Answer :}$

Given :

Speed - 90 km/h .

Time - 30 minutes.

Solution :

${(A)}$ ,

Formula For Conversion of km/h to m/s -

= Divide Speed By 3.6 Or Multiply By $\frac{5}{18}$

Hence,

$= \frac{90}{3.6} \\ = 25$

So, $\huge{25 \: m/s}$ Is The Speed of Car in m/s.

${(B) }$ ,

Conversion of Minutes into Hour,

$30 \: m = \frac{1}{2} h$

Distance = Speed × Time ,

Therefore,

$distance = 90 \times \frac{1}{2} \\ distance = 45 \: km$

So, $\huge{45 \: km}$ Is the Distance Covered by Car.

$\huge{Thanks}$