alleryA rhombus has area 150 cm2 and one diagonal of 20 cm. What is the other diagonal?
A12 cm
B15 cm
C7.5 cm
D30 cm
Answer & Solution
Correct answer: B. 15 cm
1. 150 = (1/2) × 20 × d2.
2. d2 = 150 ÷ 10 = 15 cm.
3. 30 cm is twice the right answer, from skipping the half.
_Source: NCERT Class 8 Mathematics, Chapter 9 Mensuration, Example 2_
Keep practising Mensuration
Browse all Mensuration questions for CTET, or explore more Mathematics topics.
Related questions
A cube is a special cuboid in which which condition holds?A hollow cylinder of curved area 4224 cm2 is cut open to a 33 cm wide rectangle. Its perimA tin has diameter 14 cm, height 20 cm. A label leaves 2 cm free at top and bottom. Area (A cabinet measures 1 m × 2 m × 1.5 m. All faces except the bottom are painted. What area iA suitcase 80 × 48 × 24 cm is covered with cloth 96 cm wide. How many metres are needed foA 15 m × 10 m × 7 m hall's walls and ceiling are painted; a can covers 100 m2. Cans neededThe surface area of a solid is the sum of the areas of its what?Two biscuit boxes each hold 480 cm3: one is 3 × 8 × 20 cm and the other 4 × 12 × 10 cm. Wh