Question

A carpet costs ₹15 per square metre. The total delivery charge is ₹21 . Pranav buys n square metres of the carpet. Choose the expression which represents the total cost in ₹. 

a) 21(n + 15)

b) 15(n + 21)

c) 15n + 21

d) 21n + 15​

Answer 1

Answer:

15N + 21

Step-by-step explanation:

We are given that,

Amount of carpet bought by Peter = N meter?

The cost per meter square of the carpet =

$15

So, the cost of 'N' meter square of carpet 15N dollars. Also, the delivery charge for the carpet = $21 Thus, the total cost of the carpet is given by,

=

Total cost = Cost per square meter + Delivery charge

i.e. Total cost = 15N + 21 (in dollars).

Hence, the expression representing the cost in dollars is '15 N + 21'.