alleryA trapezium shaped field has area 270 m2 and height 12 m. One parallel side is 15 m. How long is the other one?
A45 m
B15 m
C30 m
D25 m
Answer & Solution
Correct answer: C. 30 m
1. 270 = (1/2) × 12 × (15 + b).
2. 15 + b = 270 ÷ 6 = 45, so b = 30 m.
3. 45 m is the sum of the two sides, not one side.
_Source: NCERT Class 8 Mathematics, Chapter 9 Mensuration, Example 1_
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