Question

A train reached the destiny at a speed of 60 kmph in 40mi .How much more speed is required to reach the same destiny in 30mi

Answer 1

Answer:

Distance = speed × time

Speed = 60 km/hr

Time = 40 mins = 40/60 = 2/3 hours

Distance = 60×2/3 = 40 km

The distance remains same but time is 30 mins

Speed = distance / time

Distance = 40 km

Time = 30 min = 30/60 = 1/2 hours

Speed = (40/1)×2 = 80 km/hr

Speed difference = 80 - 60 = 20 km/hr

Therefore speed should be increased by 20 km/hr to reach the destiny in 30 mins.

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Answer 2

$\begin{lgathered} \red{\bf{Given}}\begin{cases} \sf \: speed = 60km \: per \: hour \\ \sf \: time \: = 40minutes</p><p>\end{cases}\end{lgathered}$

$\Large\bold\star\underline{\underline\textbf{Formula\:used}}$

$\boxed{ \sf \: Distance = Speed \times Time}$

$\bf \: as \: 1 \: hour \: =60 \: minutes \\ \sf \: putting \: values \: we \: get \\ \\ \red\longrightarrow \: D = 60 \times \frac{40}{60} = \pink{40km}$

$\rule{200}{4}$

$\begin{lgathered} \red{\bf{Given}}\begin{cases} \sf \: distance = 4km \\ \sf \: time \: = 30minutes \\ \bf \: speed = ? \end{cases}\end{lgathered} \:$

$\Large\bold\star\underline{\underline\textbf{Formula\:used}}$

$\boxed{ \bf \: speed \: = \dfrac{distance}{time}}$

Putting Values now we get,,,

$\red\longrightarrow \sf \: speed = \dfrac{40}{ \dfrac{30}{60} } \\ \\ \red\longrightarrow \: speed \: = 40 \times 2 \\ \\ \red\longrightarrow \: \bold{\boxed{\large{\boxed{\orange{\small{\boxed{\large{\red{\bold{\:speed =40km/h}}}}}}}}}} \: \:$

Hence Speed of Train would be 20km/h more ,,

To reach in 30 minutes ..

$\rule{200}{4}$

$\large\underline\textbf{Hope it Helps You.}$

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