Test Index

JAMB Mathematics 2020 Paper

© africaexams.com

Question : 13

Total: 40

In preparing rice cutlets, a cook used 75g of rice, 40g of margarine, 105g of meat and 20g of bread crumbs. Find the angle of the sector which represent meat in a pie chart?

30 $^{\circ}$
60 $^{\circ}$
112.5 $^{\circ}$
157.5 $^{\circ}$

Solution:

Concept:

In a pie chart, each sector angle is proportional to the item's mass as a fraction of the total mass.

Explanation:

Total mass of all ingredients:

75 + 40 + 105 + 20 = 240

g

Mass of meat

= 105

g

Sector angle for meat

= \frac{\text{mass of meat}}{\text{total mass}} \times 360^{\circ}

= \frac{105}{240} \times 360^{\circ}

= 157.5^{\circ}

Answer:

D.

157.5^{\circ}

© africaexams.com

Go to Question:

Prev Question

Next Question