Question

. If cost of a dozen pencils is ₹ 30, then answer the following questions:
a) How many pencils can be bought for ₹ 30?
b) What is the cost of 1 pencil?
c) How many pencils can be bought for ₹ 15?
d) How many pencils can be bought for ₹ 60?
e) How many dozen pencils can be bought for ₹ 90?

Answer 1

Given,

The Cost of a dozen pencils is ₹ 30

To find,

a) How many pencils can be bought for ₹ 30?

b) What is the cost of 1 pencil?

c) How many pencils can be bought for ₹ 15?

d) How many pencils can be bought for ₹ 60?

e) How many dozen pencils can be bought for ₹ 90?

Solution,

Cost of 12 (a dozen) pencils = Rs. 30

COst of 1 pencil = Rs. 30/12 = Rs. 2.5

Let us find answers of above questions one by one:

a). Number of pencils that can be bought for Rs. 30

= Rs.30/Rs. 2.5 = 12 pencils

b). Cost of 1 pencil = Rs 2.5 (proved above)

c). Number of pencils that can be bought for Rs. 15

= Rs.15/Rs. 2.5 = 6 pencils

d). Number of pencils that can be bought for Rs. 60

= Rs.60/Rs. 2.5 = 24 pencils

e). Number of pencils that can be bought for Rs. 90

= Rs.90/Rs. 2.5 = 36 pencils = 3 dozen pencils

Answer 2

$\huge \fbox \blue{✯ANSWER:}$

$\fbox \pink{1st Question:}$

We know, 1 dozen = 12

⇒Cost of 12 pencils given = ₹30

∴ 12 pencils can be bought in ₹30

$\fbox \orange{2nd Question:}$

⇒Cost of 12 pencils = ₹30

⇒Cost of 1 pencil = 30÷12

∴ Cost of 1 pencil = ₹2.5

$\fbox \red{3rd Question:}$

⇒ Pencils bought for ₹30 = 12

⇒ Pencils bought for ₹15 = 30÷15

∴ Pencils bought for ₹15 = ₹2

$\fbox \green{4th Question:}$

⇒Pencils bought for ₹30 = 12

⇒ Pencils bought for ₹60 = 60÷24

∴ Pencils bought for ₹60 = 24

$\fbox \purple{5th Question:}$

⇒Dozen of pencil bought in ₹30 = 1 dozen

⇒ Dozen of pencil bought in ₹90 = 90÷30

∴ 3 pencils can be bought for ₹90.

PLEASE MARK ✨BRAINLIEST✨