A cement company earns a profit of ₹ 8 per bag of white cement sold and a loss of ₹ 5 per bag. Class 7

A cement company earns a profit of ₹ 8 per bag of white cement sold and a loss of ₹ 5 per bag. Class 7

Question 1.

A cement company earns a profit of ₹ 8 per bag of white cement sold and a loss of ₹ 5 per bag of grey cement sold. [Represent the profit/loss as integers.] Class 7

(a) The company sells 3,000 bags of white cement and 5,000 bags of grey cement in a month. What is its profit or loss?

Solution:

(a) Company sell = 3000 × (+ ₹ 8) + 5000 × (- ₹ 5)

= ₹ 24000 - ₹ 25000 = - ₹1000.

So, there is loss of ₹ 1000.

(b) If the n umber of bags of grey cement sold is 6,400 bags, what is the number of bags of white cement the company must sell to have neither profit nor loss.

Solution:

Sell from grey cement

= 6400 × (- ₹ 5) = - ₹ 32000.

So, for neither profit nor loss, number of white bags to be sold = ₹ 32000 ÷ ₹ 8 = 4000.

Question 2.

Replace the blank with an integer to make a true statement. Class 7

(a) (-3) × _____ = 27

(b) 5 × _____ = (- 35)

(c) _____ × (-  8) = (-  56)

(d) _____ × (- 12) = 132

(e) _____ ÷ (-  8) = 7

(f) _____ ÷ 12 = -  11

Solution:

(a) (- 3) × 9 = 27

(b) 5 × (-7) = (- 35)

(c) 7 × (- 8) = (- 56)

(d) (-11) × (- 12) = 132

(e) (-56) ÷ (- 8) = 7

(f) (-132) ÷ 12 = - 11