A wall of 100 metres can be built by 7 men or 10 women in 10 days. How many,dqya will 14 men and 20 women take to build a wall of 600 metres ?

A wall of 100 metres can be built by 7 men or 10 women in 10 days. How many,dqya will 14 men and 20 women take to build a wall of 600 metres ?
1). 15
2). 20
3). 25
4). 30

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