Exercise 13.1
1 Following are the car parking charges near a railway station up to :
4 hrs ₹ 60
8 hrs ₹ 100
12 hrs ₹140
24 hrs ₹ 180
Check if the parking charges are in direct proportion to the parking time.
Answer :
Changes per hour
C₁= ⁶⁰/₄ = ₹15
C₂= ¹⁰⁰/₈ = ₹ 12.50
C₃ = ¹⁴⁰/₁₂ = ₹ 11.67
C₄ = ¹⁸⁰/₂₄ = ₹ 7.50
Hence, the charges per hour not same,
i.e. C₁ ≠C₂≠ C₃≠ C₄
∴ The parking charges are not in direct proportion to the parking time.
2. A mixture of paint is prepared by mixing 1 part of red pigments with 8 parts of base. In the following table, find the parts of base that need to be added.
3. In Question 2 above, if 1 part of a red pigment requires 75 mL of base, how much red pigment should we mix with 1800 mL of base?
4. A machine in a soft drink factory fills 840 bottles in six hours. How many bottles will it fill in five hours?