Unique Academic Board Solutions for Exercise 4: Exercise 4

A number consists of two digits whose sum is $9$. If $27$ is subtracted from the number, its digits are reversed. The number is _____ .

At what rate percent per annum compound interest, will $Rs.10,000$ amount to $Rs.13,310$ in three years ?

A swimming pool is $20 m$ long $15 m$ wide and $3 m$ deep. What will be the cost of repairing the floor and wall of the pool at the rate of $Rs.25$ per square metre ?

The Jogbani - Biratnagar and Jayanagar - Bijalpura- Bardibas lines connect India to-

If $15$ boys earn $Rs.900$ in $5$ days, how much will $20$ boys earn in $7$ days ?

The vitamin which is liable to be destroyed during cooking is-

A man bought an article and sold it at a gain of $10\%$. If he had bought is at $20\%$ less and sold it for $Rs.10$ more, he would have made a profit of $40\%$. The cost price of the article is-

In a $500 \mathrm{m}$ race, the ratio of the speeds of A and B is $3 : 4$. A has start of $140 m$,  A wins by: