A man works for 8 hrs. On one day and 7 hrs on the second day. If he earns ₹45 per an hour. How much will be his total earnings. Express it in mathematical notation.

Ram gives his son Rs. 100 on one day, Rs. 50 on the second day, Rs. 25 on third day and so on. What will be total amount given by Ram to his son starting from the first day, if he lives forever?

Krishna read 1/3 of a book in 1 hour. Then how much he will read in 3 1/3 hrs?

Rehana works 2 1/2 hours each day on her embroidery. She completes the work in 7 days. How many hours did she take to complete her work?

24 men working at 8 hours per day can do a piece of work in 15 days. In how many days can 20 men working at 9 hours per day can complete the same work?

If a mason worked 100 hours in 12.5 days to construct a wall then how many hours he totally worked in a day?

24 workers working 6 hours a day can finish a piece of work in 14 days.if each worker works 7 hours a day, find the number of workers to finish the same piece of work in 8 days.

Ravi can paint (3)/(7) of a house in one day. If he continues working at this rate, how many days will he take to paint the whole house?

An astronaut receives the energy required in his body by the combustion of 34gm of sucrose per hour. How much oxygen he has to carry along with him for his energy requirement in a day?

An astronaut receives the energy required in his body by the combustion of 34g of sucrose per hour. How much oxygen he has to carry along with him for his energy requirement in a day?