Haneet Gandhi and Yukti Sharma Solutions for Chapter: Decimals, Percents and Ratios, Exercise 1: CHECK YOUR MATHEMATICS

A train travels at a constant speed of $120 km/hr$. Its destination is $600 km$ away. The train started at $2 pm$. At what time will it reach its destination?

The cost of a book was first increased by $20\%$, but later, it was dropped by $20\%$. What is the net result?

If the sides of a square are increased by $10\%$, its area will increase by _____

If the sides of a square is increased by $10\%$, its perimeter will increase by _____.

Find the value of digit '$d$' in the number $0.d64$, if it satisfies the following two conditions:

(i.) $d<5$

(ii.) $0.d64<\frac{1}{d}$

Mallika, Neena and Hussain are $13, 12$ and $10$ years old respectively. They wish to share $₹350$ in the ratio of their ages. Neena further gave one-third of her share to her mother. How much is Neena left with?

The salaries of A, B, and C are in the ratio of $2 : 3 : 5$. If A gets an increment of $15\%$, B of $10\%$ and C gets an increment of $20\%$, then find the ratio of their new salaries.

A number is first increased by $10\%$ and then decreased by $10\%$. The net result will be _______.