A completes $$ {7\over 10}$$ of work in 15 days, then he completes the remaining work with the help of B in 4 days. The time required for A and B together to complete the entire work is
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Q:
A completes $$ {7\over 10}$$ of work in 15 days, then he completes the remaining work with the help of B in 4 days. The time required for A and B together to complete the entire work is
- 1$$ {10} {2\over 3}\ days$$false
- 2$$ {12} {2\over 3}\ days $$false
- 3$$ {13} {1\over 3}\ days $$true
- 4$$ {8} {1\over 4}\ days $$false
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