Question:
If the space diagonal of a cuboid is 13 cm, and two of its edges are 3 cm and 4 cm, what is the third edge?
यदि एक घनाभ का विकर्ण 13 cm है, और इसके दो किनारे 3 cm और 4 cm हैं, तो तीसरा किनारा क्या है?
Options:
- a) 11 cm
- b) 12 cm
- c) 13 cm
- d) 14 cm
- a) 11 cm
- b) 12 cm
- c) 13 cm
- d) 14 cm
correct answer : b)
Explanation:
13² = 3² + 4² + x² => 169 = 9 + 16 + x² => 144 = x² => x = 12.
13² = 3² + 4² + x² => 169 = 9 + 16 + x² => 144 = x² => x = 12.