Question

24. write three rational numbers between -1/2 and 1/2
25. the area of a square and a rectangle are equal. if the side of the square 30 cm and breath of the rectangle is 25 cm, find the length of the rectangle.
26. chalk contains calcium, carbon and oxygen in the ratio 10:3:12.
i) find the percentage of carbon in chalk.
ii) if in a stick of chalk, carbon is 6g. what is the weight of the chalk stick?
27. A path 1m wide is built along the border and inside a square garden of side 26m. find:
i) the area of the path.
ii) the cost of planting grass in remaining portion of the garden at the rate of Rs. 45 per m2 ​

Answer 1

Step-by-step explanation:

Area of square =SxS

Area of square=900cm square

area of square=area of rectangle

therefore=900=l*b

900=l*25

l=900/25

l=36