Question

A+B means A×B A÷B means A-B A-B means A÷B. 28-4×3÷10​

Answer 1

Answer:

Solution−

Let assume that

Speed of the train be x km per hour

Speed of the car be y km per hour

Case :- 1

A man travels 600km apart by train and partly by car. It takes 8 hours and 40 minutes if he travels 320 km by train and rest by car.

Distance travelled by train = 320 km

So,

Distance travelled by car = 600 - 320 = 280 km

Time taken = 8 hr 40 min

So,

\begin{gathered}\rm \: \dfrac{320}{x} + \dfrac{280}{y} = 8\dfrac{40}{60} \\ \end{gathered}

x

320

+

y

280

=8

60

40

\begin{gathered}\rm \: \dfrac{320}{x} + \dfrac{280}{y} = 8\dfrac{2}{3} \\ \end{gathered}

x

320

+

y

280

=8

3

2

\begin{gathered}\rm \: \dfrac{320}{x} + \dfrac{280}{y} = \dfrac{26}{3} - - - (1) \\ \end{gathered}

x

320

+

y

280

=

3

26

−−−(1)