A) 30cm
B) 70cm
C) 50cm
D) 40cm
Correct Answer: D
Solution :
3x + 7x = 100 x = 10. Longer piece is \[7\times 10=70\]cm long. Shorter piece is \[3\times 10=30\]cm long. Difference = 70 - 30 = 40 cm.You need to login to perform this action.
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