Question
Ram can do a piece of work in 50 days. He alone worked
at it for 20 days and then Lakshman completed alone the rest work in 30 days. In how many days, they will complete the whole work, working together?Solution
Efficiency of Ram = 100/50 = 2% Work done by Ram in 20 days = 20/50 × 100 = 40% Remaining work = 60% Efficiency of Lakshman = 60/30 = 2% Therefore, required number of days = 100/((2+2)) = 100/4 = 25 days
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If the following interchanges are made in signs, then what would be the value of the following expression?
16 ÷ 64 X 20 - 16 + 18
Interch...
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250 × 10 �...
If '@' means '÷', '#' means ' X ', '$' means '+' and '%' means '-' then what would be the value of the expression given below?
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