Question

a car travels 10 metre in 5 second 20 metre in 10 second and 30 metre in 10 seconds The speed of a car is 54 km per hour Express in metre per second calculate the distance covered by the body in 30 second​

Answer 1

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Answer 2

$</p><p> </p><p> </p><p>Answer:</p><p></p><p>Given :-</p><p>Ganesh travelled a distance of 108 km by a car in 2 hours.</p><p>To Find :-</p><p>What is the speed of a car in m/sec.</p><p>Formula Used :-</p><p>➦ To find speed we know that,</p><p></p><p>{\red{\boxed{\large{\bold{Speed =\: \dfrac{Distance}{Time}}}}}} </p><p>Speed= </p><p>Time</p><p>Distance</p><p> </p><p> </p><p> </p><p> </p><p></p><p>Solution :-</p><p>➲ First, we have to convert km to m.</p><p></p><p>As we know that,</p><p></p><p>★ 1 kilometres = 1000 metres ★</p><p></p><p>Given :</p><p></p><p>Distance = 108 km</p><p>Then,</p><p></p><p>⇒ \sf Distance =\: 108 \times 1000Distance=108×1000</p><p></p><p>➤ \sf\bold{\green{Distance =\: 108000\: m}}Distance=108000m</p><p></p><p>Hence, the distance in metre is 108000 m</p><p></p><p>➲ Again, we have to convert hours to seconds,</p><p></p><p>As we know that,</p><p></p><p>✪ 1 hours = 3600 seconds ✪</p><p></p><p>Given :</p><p></p><p>Time = 2 hours</p><p>Then,</p><p></p><p>⇒ \sf Time =\: 2 \times 3600Time=2×3600</p><p></p><p>➤ \sf\bold{\green{Time =\: 7200\: seconds}}Time=7200seconds</p><p></p><p>Hence, the time in seconds is 7200 seconds.</p><p></p><p>➦ Now, we have to find the speed in m/sec,</p><p></p><p>Given :</p><p></p><p>Distance = 108000 m</p><p>Time = 7200 sec</p><p>According to the question by using the formula we get,</p><p></p><p>↦ \sf Speed =\: \dfrac{1080\cancel{00}}{72\cancel{00}}Speed= </p><p>72 </p><p>00</p><p> </p><p>1080 </p><p>00</p><p> </p><p> </p><p> </p><p></p><p>↦ \sf Speed =\: \dfrac{\cancel{1080}}{\cancel{72}}Speed= </p><p>72</p><p> </p><p>1080</p><p> </p><p> </p><p> </p><p></p><p>➠ \sf\bold{\purple{Speed =\: 15\: m/sec}}Speed=15m/sec</p><p></p><p>{\underline{\boxed{\small{\bf{\therefore The\: speed\: a\: car\: in\: m/sec\: is\: 15\: m/sec\: .}}}}} </p><p>∴Thespeedacarinm/secis15m/sec.</p><p> </p><p> </p><p>$