Question

3. Karan has three gift boxes of different sizes. The first box is 10 cm longer than the third box and the
second box is 5 cm longer than the third box. If the total length of the three boxes is 75 cm, then find the
length of each box.

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Answer 1

x+10+x+5+x=75

3x+15 =75

3x=60

x=20

so first box length 30cm, second=25,cm third 20cm

Answer 2

Answer:

first box is 30 cm

second is 25

and third is 20

Step-by-step explanation:

let the length of third box be x...........1

then according to question,

first box's length is (10+x)..................2

first box's length is (10+x)..................2second box's length is (5+x)..............3

and grand total is 75

then,

x+(10+x)+(5+x)=75

now we open the bracket

x+10+x+5+x=75

x+10+x+5+x=753x+15=75

x+10+x+5+x=753x+15=753x=75-15

x+10+x+5+x=753x+15=753x=75-153x=60

x=60÷3=20

now put this value in equation 2 and 3

10+x=10+20=30cm

5+20=25cm

now add

30+25+20=75