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Time taken by A alone to complete the entire work = 18/0.4 = 45 days Time taken by B alone to complete the entire work = 45 + 15 = 60 days Let the total work = L.C.M of 45, 60 and 20 = 180 units Then, efficiency of B = (180/60) = 3 units/day Combined efficiency of B and C = (180/20) = 9 units/day So, efficiency of C alone = 9 – 3 = 6 units/day So, time taken by C alone to complete the entire work = (180/6) = 30 days
Ramu has lent Rs. 60,000 to Murali and Bansi at 7% p.a. and at 11% per annum respectively. At the end of the year, he has gained an overall interest at ...
If a wheel covers a distance of 880 m in 40 rotations, then the diameter of the wheel is?
A Hemi sphere has a volume of 486π cubic units. What is the radius of the sphere?
A vessel contains 50 liters of a solution with 40% acid. 10 liters of this solution are removed and replaced with a solution containing 70% acid. The pr...
Cost of two types of pulses is Rs.10 and Rs, 15 per kg, respectively. If both the pulses are mixed together in the ratio 2:3, then what should be the pr...
A sum of ₹ 62 was divided among 100 students. If each boy got 70 paisa and each girl got 45 paisa. Find the number of boys?
The ratio of the present ages of Ginni and Binni is 7:4 respectively. Ginni is ‘n’ years older than Binni. If after 2 years, the ratio of the ages o...
12, 13, 22, 47, 96, ?
On reducing the marked price of his goods by ₹28, a shopkeeper gains 20%. If the cost price of the article be ₹560 and it is sold at the marked pric...
In what ratio rice at 44 Rs/kg should be mixed with the rice at 28 Rs/kg so that selling mixture at Rs 42 per kg gives the profit of 20% if the quantity...
