If the length, breadth and the height of a cuboid are in the ratio 6: 5: 4 and if the total surface area is 33300 cm², then length breadth and height in cms, are respectively?
Q1. If the length, breadth and the height of a cuboid are in the ratio 6: 5: 4 and if the total surface area is 33300 cm², then length breadth and height in cms, are respectively?
Answer: 90, 75,60
Explanation: Let dimensions be 6k, 5k, 4k; total surface area = 2(6k×5k + 5k×4k + 4k×6k) = 2(30+20+24)k² = 148k² = 33300, so k² = 225, k = 15; dimensions = 90, 75, 60 cm.