One wall of Nilajul’s house has damaged. To repair the wall properly, they appointed masons. 5 masons took Rs.1000 daily and they worked for 6 days and complete half of the work. Find the total cost to repair the wall.

In 6 days, 5 masons finished only half of the work. But 3 masons took more days to finish the remaining the work. Why so?

A light is placed on the groung at a distance of 30 ft from a house. A man 6 ft tall walks from the light towards the house at the rate of 5 ft/s find the rate at which his shadow on the wall is shortening when he is 15 ft from the wall.

For cleaning and purification of a pond in Bakultala, local panchayat appointed few men. The men worked as many days there were number of men appointed and got a total amount of Rs. 12375. If each one got Rs. 55 day, then let's find how many men worked.

20- men, decided to complete the repairing work, of a house in 30 days. But after 6 days 8 men feel sick. Let's find, how long they will take to complete the work.

There are two 60 watt lamps and two 80 watt fans in a house. The lamps and fans run 5 hours daily. Find out the expense in a month if an unit of electricity costs Rs.4/-. (assume one mont = 30 days).