unitary method :
1. A car covers 310 km in 5 hrs. How much time will it take to cover 403km ???
2. 18 bags of rice having equal weights weigh 297 kg. How much will such bags weigh ?
Quick show it with process and rough work
Answers
1. A car covers 310 km in 5 hrs. How much time will it take to cover 403km ?
The time taken by the car to cover 310 km = 5 hrs. = 6.5 hr or we can say that 6 hrs 30 mins.
_______________________________
2. 18 bags of rice having equal weights weigh 297 kg. How much will such bags weigh ?
18 bags weight 297kg. Weight of 22 such bags. First we need to find the weight of 1 bag. 16.5 kg is the weight of one bag.
Answer: Solution:-
A car cover 310km in 5 hrs.
In 1 hrs Distance covered by car:-
\begin{gathered} = > \frac{310}{5} \\ = > 62km\end{gathered}
=>
5
310
=>62km
In 1 hrs he covers 62km
So,
Time taken to cover 403km=
\begin{gathered} = > \frac{403}{62} \\ = > 6.5hrs\end{gathered}
=>
62
403
=>6.5hrs
Hence,
Time taken to travel 403km is 6.5 hrs
2: The weight of 22 bags is 363 kg.
\textbf{\underline{\underline{Explanation :-}}}
Explanation :-
\textsf{\underline{\underline{Given :}}}
Given :
18 bags weight 297kg.
\textsf{\underline{\underline{To find :}}}
To find :
Weight of 22 such bags.
\textsf{\underline{\underline{Solution :}}}
Solution :
First we need to find the weight of 1 bag.
Weight of one bag =
\sf{\implies} \: 297 \div 18⟹297÷18
\sf{\implies}{\red{ \: 16.5 \: kg}}⟹16.5kg
16.5 kg is the weight of one bag.
Weight of 22 bags =
\sf{\implies} \: 16.5 \times 22⟹16.5×22
\sf{\implies}\red {\: 363 \: kg}⟹363kg
\therefore∴ The weight of 22 bags is 363 kg.