Class 7, Maths, Chapter 8, Exercise 8.1 Solutions
Q.1. Find the ratio of:
(a) ₹ 5 to 50 paise
(b) 15 kg to 210 g
(c) 9 m to 27 cm
(d) 30 days to 36 hours
Ans:
Q.2. In a computer lab, there are 3 computers for every 6 students. How many computers will be needed for 24 students?
Ans:
Number of computers required for 6 students = 3
Therefore, number of computers required for 1 student
$=\left( \frac{3}{6} \right)=\frac{1}{2}$computer
hence, number of computers required for 24 students
$=24\times \frac{1}{2}=12$
∴ Number of computers required for 24 students is 12 computers.
Q.3. Population of Rajasthan = 570 lakhs and population of UP = 1660 lakhs.
Area of Rajasthan = 3 lakh km2 and area of UP = 2 lakh km2.
(i) How many people are there per km2 in both these States?
(ii) Which State is less populated?
