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All the soldiers are arranged in the for...

All the soldiers are arranged in the form of an equilateral triangle i.e., one soldier in the front and 2 soldiers in the second row and 3 soldiers in the third row, 4 soldiers in the fourth row and so on. If 669 more soldiers of another company are added in such a way that all the soldiers now are in the form of an square and each of the sides then contain 8 soldiers less than each side of equilateral triangle. Initially, how many soldiers were there ?

A

2056

B

1540

C

1400

D

1220

Text Solution

Verified by Experts

The correct Answer is:
B
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