Question

how many envelopes can be made out of a sheet of paper of size 3 m 40 cm × 1 m 50 cm if each envelope is of size 25 cm × 12 cm?

Answer 1

Given :  a sheet of paper of size 3 m 40 cm × 1 m 50 cm

To Find : Number of envelopes can be made of  size 25 cm × 12 cm

Solution:

a sheet of paper of size 3 m 40 cm × 1 m 50 cm

3 m 40 cm = 340 cm

1 m 50 cm = 150 cm

Area = 340 x 150

Envelop size = 25 * 12  cm

Using direct area formula  =   340 x 150 / 25 * 12   =  170 envelopes

But actually

150 / 25 = 6

340 / 12 = 28.33 = 28  ( as has to be integer )

Hence envelopes = 28 * 6 = 168  envelopes

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Answer 2

Answer:

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