If each of length , breadth, height of a cuboid are increased by 25% , then the ratio of total surface areas of new and old cuboids is
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let the l,b and h be 4,8,12
tsa of the cuboid =64+192+96=352
after increasing, l,b anh are 5,10,15
tsa =100+300+150=550
ratio=352:550
=176:275
=100:64
=50:32
=25:16
tsa of the cuboid =64+192+96=352
after increasing, l,b anh are 5,10,15
tsa =100+300+150=550
ratio=352:550
=176:275
=100:64
=50:32
=25:16
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