Question

2. Solve the following:

(a) Write two equivalent ratio of 2:4.

(b) Find the radius of the circle if diameter is 24.8 cm.

(c) Find the perimeter of a regular hexagon of side equal to 7 cm.

(d) Convert 420 : 360 into simplest form.

(e) Express 17 kg to 85 g in the ratio form.

(f) Find the distance covered by train in 15 hours if the speed is 4 km/hr.

(g) Find the area of a square of side 8 cm.

(h) Compare: 72 m/s ____ 144 km/hr

(i) Find the mean proportion between 16 and 64.

(j) If 4 books cost 480, what will be the cost of 12 books?​

Answer 1

Step-by-step explanation:

(a) The equivalent ratios are 4:8, 1:2

(b) R = Diameter/2

= 24.8/2

= 12.4 cm

(c) Perimeter of Hexagon: 6*s

= 42cm

(d) _____

(e) 1700 : 85 g

(f) Distance = S*T

= 15*4

= 60 km

(g) A of square = side * side

= 8*8

= 64cm²

Answer 2

Answer:

Number of girls = 20

Number of boys = 15

Total number of students = 20 + 15 = 35

(a) Ratio of number of girls to boys =20/15

(b) Ratio of number of girls to total students =20/35