NCERT Exemplar Solutions
Class 7 - Mathematics - Unit 9: Perimeter and Area - Fill in the BlanksQuestion 46
Class 7 - Mathematics - Unit 9: Perimeter and Area - Fill in the Blanks
Question. 46
If area of a triangular piece of cardboard is 90 cm², then the length of altitude corresponding to 20 cm long base is ________ cm.
Answer:
The length of altitude is 9 cm.
Detailed Answer with Explanation:
Area = ½ × base × height = 90 ⇒ ½ × 20 × h = 90 ⇒ h = 9 cm.