We know that the area of parallelogram = base x height
(a) Here, base = 20 cm and area = 246 cm²
∴ Area of parallelogram = base x height
⇒ 246 = 20 x height
⇒ height = 246/20 = 12.3 cm

(b) Here, height = 15 cm and area = 154.5 cm²
∴ Area of parallelogram = base x height
⇒ 154.5 = base x 15
⇒ base = 154.5/15 = 10.3 cm

(c) Here, height = 8.4 cm and area = 48.72 cm²
∴ Area of parallelogram = base x height
⇒ 48.72 = base x 8.4
⇒ base = 48.72/8.4 = 5.8 cm

(d) Here, base = 15.6 cm and area = 16.38 cm²
∴ Area of parallelogram = base x height
⇒ 16.38 = 15.6 x height
⇒ height = 16.38/15.6 = 1.05 cm

Class 7 Maths Chapter 11 Exercise 11.2

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