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A family plots its electricity bills (in ₹) as a bar graph: Jan 800, Feb 600, Mar 1000, Apr 1200.
The family wants the April bar to be exactly 8 cm tall.
What scale (1 cm = ₹ ___ ) should they use, and how tall will the January bar be?

Class 7Bar GraphsData Handling
  • A1 cm = ₹150; Jan bar = cm ≈ 5.33 cm
  • B1 cm = ₹150; Jan bar = 8 cm
  • C1 cm = ₹100; Jan bar = 8 cm
  • D1 cm = ₹200; Jan bar = 4 cm

Step-by-Step Solution

For April (₹1200) to be 8 cm: scale = 1200/8 = ₹150 per cm. Jan (₹800) height ≈ 5.33 cm.
Answer: A) 1 cm = ₹150; Jan bar = cm ≈ 5.33 cm

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