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The ratio of the length of the parallel sides of a trapezium is 3:2. The shortest distance between them is 15 cm. If the area of the trapezium is 450 cm², the sum of the length of the parallel sides is
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- 15 cm
- 36 cm
- 42 cm
- 60 cm
- 15 cm
Correct Option: D
Using Rule 13,
Area of the trapezium = 1/2 (sum of parallel sides) × altitude
| ⇒ 450 = | (3x + 2x) × 15 | |
| 2 |
| ⇒ 5x = | = 60 cm | |
| 15 |
