Question

A car is running at a speed of 99 km/hr. What distance will it cover in 30 second​

Answer 1

Answer:

Answer. So, car can travel in 15 sec = 15 *30 = 450 m.

Answer 2

${\mathtt{\large{Question}}}$

A car is running at a speed of 99 km/hr. What distance will it cover in 30 second

${\mathtt{ \large{Solution}}}$

Here the relation between speed, distance and time is used.

It is given as :-

${\underline{\boxed{\sf{speed = \frac{distance}{time}}}}}$

✏️In 1 hour 99km can be covered. So using speed, distance,time relation we can find the distance covered in 30 seconds.

✏️First convert the unit km/hr into m/sec by multiplying 99km/hr by 5/18.

$\mathtt \color{grey}{Unit \: conversion}$

$\sf{\implies 99× \frac{5}{18}} \\ \\ \sf{\implies\frac{495}{18}} \\ \\ \sf{ \implies 27.5 m/sec}$

$\mathtt{ \to Distance \: covered \: in \: 30 sec = 27.5 × 30} \\ \\ \mathtt{ \to Distance \: covered \: in \: 30 sec = \color{red}{ 825 \: metres}}$

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