a post man has to deliver 450 letters . the number of letters delivered in one street is twice the number deliverid in other . if he is left with 120 letters then find the number of letters deliverd in the first street
plsss do it step by step
i have to explain in class in board
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not joking
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number of letters he has to post= 450
let the ratio between the letters delivered on each street be 1:2 =1x and 2x
with the exception of 120 letters we are left with 330 letters
equation is:
1x+2x=330
3x=330
x=330/3
x=110
first street = 110
2nd street=220
let the ratio between the letters delivered on each street be 1:2 =1x and 2x
with the exception of 120 letters we are left with 330 letters
equation is:
1x+2x=330
3x=330
x=330/3
x=110
first street = 110
2nd street=220
Answered by
0
Answer: 1st street = 110
2nd street = 220
Step-by-step explanation:
1st street = x
2nd street = 2x
x + 2x + 120 =450
3x + 120 = 450
3x = 450 - 120
x = 110
1st street = 110
2nd street = 110 * 2 = 220
3rd street = 120
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