If 9 men working 6 hours a day can do a work in 88 days. Then 6 men working 8 hours a day can do it in how many days?
If men is fixed,work is proportional to time. If work is fixed, then time is inversely proportional to men therefore, (M1 $\times$ T1/W1)=(M2 $\times$ T2/W2) From the above formula i.e (m1 $\times$ t1/w1)=(m2 $\times$ t2/w2) so (9 $\times$ 6 $\times$ 88/1)=(6 $\times$ 8 $\times$ d/1) on solving, d=99 days.
|
Walking at 3/4 of his usual speed ,a man is late by 2 1/2 hr. the usual time is |
Answer |
|
In a boat 25 persons were sitting. Their average weight increased one kilogram when One man goes and a new man comes in. The weight of the new man is 70kgs. Find the Weight of the man who is going ? |
Answer |
|
A man can row 4.5 km/hr in still water. It takes him twice as long to row upstream as to row downstream. What is the rate of the current ? |
Answer |
|
A sum of money amounts to Rs. 9800 after 5 years and Rs. 12005 after 8 years at the same rate of simple interest. The rate of interest per annum is |
Answer |
|
A man starts walking at 3 pm . he walks at a speed of 4 km/hr on level ground and at a speed of 3 km/hr on uphill , 6 km/hr downhill and then 4 km/hr on level ground to reach home at 9 pm. What is the distance covered on one way? |
Answer |
|
In a group of cows and hens, the number of legs are 14 more than twice the number of heads. The number of cows is |
Answer |
|
I have a few sweets to be distributed. If I keep 2, 3 or 4 in a pack, I am left with one sweet. If I keep 5 in a pack, I am left with none. What is the minimum number of sweets I have to pack and distribute ? |
Answer |
|
2 trains starting at the same time from 2 stations 200km apart and going in opposite direction cross each other at a distance of 110km from one of the stations.what is the ratio of their speeds ? |
Answer |
|
If 9x-3y=12 and 3x-5y=7 then 6x-2y = ? |
Answer |
|
Two bus tickets from city A to B and three tickets from city A to C cost Rs. 77 but three tickets from city A to B and two tickets from city A to C cost Rs. 73. What are the fares for cities B and C from A ? |
Answer |