Question

maths text book new syllabus mathematics 7th edition ex15 question 2

Answer 1

Answer:

i) 90°

ii) let vanilla be x, then, x+50+90+120=360

X=360-260

X=100°

iii) 27%

iv) 36

Answer 2

Answer:

i] one-quarter of 360°= 360°/4 = 90°

ii] angle that represents vanilla = 360° - (120°+90°+50°) = 360° - 260° = 100°

iii] percentage of students who like vanilla = (100/360 X 100) = 27.78 %

iv] 5 students like mango ice-cream which represents 50° out of 360°

let the total no. of students be x

(5/x) 360° = 50°

5/x = 50°/360°

reversing the equation we get

x/5 = 36/5

x = (36/5)X5

x= 36