Question

pls help me fast
thanks ​

Answer 1

Step-by-step explanation:

Given that,

➡ A bus covers 90km in 2½ hrs.

To find :

1. The time is required to cover 30 km.
2. The distance can be covered in 2 hrs with the same speed.

Solution :

The speed of the bus is =

$= \sf \frac{90}{2 \frac{1}{2} } \\ \sf \: = \frac{90}{ \frac{5}{2} } \\ = \sf \: \frac{90 \times 2}{5} \\ = \sf \: 18 \times 2 = 36km/hour$

➡ Ans. 1.

$\sf \longrightarrow Time = \: \frac{distance}{speed} \\ \sf \longrightarrow Time = \: \frac{30}{36}hrs. \\ \sf \longrightarrow Time = \: \frac{30}{36} \times 3600 \: secs \\ \sf \longrightarrow Time = \: 30 \times 100 \\ \sf \longrightarrow Time = \: 3000 \: secs \:$

➡ Ans. 2.

$\sf \longrightarrow Distance = time \times speed \\ \sf \longrightarrow Distance = 2 \times 36 \\ \sf \longrightarrow Distance = 72km \: ans.$