West Bengal Board Solutions for Chapter: Rule of Three, Exercise 2: Let's work out - 10.1

Today my father has bought $15 \mathrm{kg}$ of rice for $₹390$. Let's workout using the rule of three method how much he would require if he would have bought the same quantity of $17 \mathrm{kg}$ of rice.

Venkat uncle will make $4$ shirts of same size with $20$ metres of cloth. Let's workout using the Rule of Three method how many metres of cloth Venkat uncle will have to purchase for making $12$ such shirts.

it took $15$ days for $30$ heads of labourers to dig a pond. Let's workout using the rule of three method in how many days $25$ heads of labourers could have complete the said work.​

My aunt reached my maternal uncle's house in five hours by driving the car at a speed of $40 \mathrm{km}/\mathrm{hr}$. Let's work out using the Rule of Three method how long it would have taken if she would have driven the car at a speed of $50 \mathrm{km}/\mathrm{hr}$

There was a stock of food grains for $9$ days to cater the needs of $4000$ people at a shelter camp in Mongalpur village. After $3$ days $1000$ people left the camp for another place. Let's workout using the Rule of three method in how many days the rest of the people will consume the remaining food grains.

Find the value of $k$.

Find the value of $k$.

Find the value of $k$ to the nearest whole number.