Question 2 - Figure it out - Page 67, 68 - Chapter 3 Class 8 - Proportional Reasoning-2 (Ganita Prakash II)

Transcript

Question 2 If 24 pencils cost ₹120, how much will 20 such pencils cost?Given that, 24 pencils cost ₹ 120 We need to find how much will 20 pencils cost Let Cost of 20 pencils be ₹ y Now, we draw a table Now, as Number of pencil increases, Cost of pencils also increases So, they are in Direct proportion So, we write numbers as 𝒙_𝟏/𝒚_𝟏 = 𝒙_𝟐/𝒚_𝟐 𝟐𝟒/𝟏𝟐𝟎=𝟐𝟎/𝒚 𝑦 × 24/120=20 𝑦= 20 ×120/24 𝒚 = 100 So, 20 pencils will cost ₹ 100