Question

The speed of a truck is 30m/s. How far does it travel in 1.5 hours​

Answer 1

Given:

• The speed of a truck is 30m/s.

To find:

• Distance travelled by it in 1.5 hours .

Solution:-

First we need to convert 1.5 hours into seconds :

$:\longrightarrow \sf 1\: hour=3600 \:seconds$

$:\longrightarrow \sf 1.5\:hour=1 {\dfrac {1}{2}}\times 3600$

$: \longrightarrow{ \sf{ \dfrac{3}{ \cancel{2}} \times \cancel{3600} }}$

$:\longrightarrow \sf 3\times 1800=5400\:seconds$

• Now according to question .

$:\longrightarrow \sf Truck\:travels\:in\:1\:s=30\:m$

$:\longrightarrow \sf It\: will\:travel\:in\:5400\:s=5400×30$

$:\longrightarrow \sf It\: will\:travel\:in\:5400\:s = 162000\:m$

$\therefore{\underline {\sf {Distance\: travelled\: by \:it \:in \:1.5 \:hours\:is\: {\bf{162km}}.}}}$

Answer 2

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Given:

Speed of truck = 30m/s

Time taken = 1.5 hours

To find:

Distance =?

Method:

While solving we have to make time in second

1 hour = 60 × 60 = 3600 secs

1.5 hour = 1.5 × 3600/1 = 5400 secs

$\\ speed \: = \dfrac{distance}{time} \\ \\ distance \: = speed \: \times time$

$\\ distance \: = 30 \times 5400 \\ \\ = 162000 \: m$

Required Answer:

Therefore, the truck travelled 162000 metre in 1.5 hours. [ 162000 m = 162 km]

Extra points:

# While solving make the unit like sec, metre etc same for easy calculations and correct results

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# Try to remember unit conversion to solve easily Example: 1 hour = 60min = 3600 second

1 km = 1000 m = 100000 cm

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# Solve more such questions to get good hold on it