R. D. Sharma Solutions for Chapter: Ratio, Proportion and Unitary Method, Exercise 3: EXERCISE

$99 \mathrm{kg}:45 \mathrm{kg}=$ $\mathrm{Rs} 44:\mathrm{Rs} 20$

If  $4, x, 9$ are in continued proportion, find the value of $x$.

If in a proportion, the first, second and fourth terms are $32,112$ and $217$ respectively, find the third term.

The ratio of the length of a school ground to its width is $5: 2$. If the width is $40 \mathrm{metres}$ and the length is $x \mathrm{metres}$, then find the value of $x$.

The ratio of the sale of eggs on a Sunday to that of the whole week of a grocery shop was $2: 9$. If the total sale of eggs in the same week was $\mathrm{Rs}.360,$ find the sale of eggs on Sunday.

The ratio of copper and zinc in an alloy is $9: 7 .$ If the weight of zinc in the alloy is $9.8 \mathrm{kg}$ and the weight of copper in the alloy is $x \mathrm{kg}$, then what is the value of $x$?

The ratio of the income to the expenditure of a family is $7: 6 .$ Find the savings if the income is $₹1400$. If the answer is $₹k$ then find $k$.

The ratio of story books in a library to other books is $1: 7 .$ The total number of story books is $800 .$ Find the total number of books in the library.