A shopkeeper sells pizzas by the slices charging Rs. 50 per slice. He has two types of pizzas one round with
30 cm diameter, divided into 10 pieces. Another pizza square in shape with side 30 cm divided in to 12
pieces.
Question 20
Anjana bought the slice of round pizza and Sanjana opted for square slice. Who got a better deal? And by
what quantity?
a) Sanjana, approximately 4 cm2
b) Anjana, approximately 4 cm2
c) Sanjana, approximately 5 cm2
d) Anjana, approximately 5 cm2
Dear Student,
Anjali took the round pizza:
Radius of circle= 15cm
Area= πr² = 22/7 x (15)² = 707.14 cm²
Area of one piece of pizza that Anjali bought= 707.14/10 = 70.71cm²
Sanjana took the square pizza:
Length of each side of square= 30cm
Area of square = side x side = 30 x 30 = 900cm²
Area of one piece of pizza that Sanjana bought = 900/12 = 75cm²
So, Sanjana got a better deal by approximately (75 - 70.71)cm² = 4.29 cm² which can be approximately taken as a) 4cm²
Regards
Anjali took the round pizza:
Radius of circle= 15cm
Area= πr² = 22/7 x (15)² = 707.14 cm²
Area of one piece of pizza that Anjali bought= 707.14/10 = 70.71cm²
Sanjana took the square pizza:
Length of each side of square= 30cm
Area of square = side x side = 30 x 30 = 900cm²
Area of one piece of pizza that Sanjana bought = 900/12 = 75cm²
So, Sanjana got a better deal by approximately (75 - 70.71)cm² = 4.29 cm² which can be approximately taken as a) 4cm²
Regards