MEDIUM
7th ICSE
IMPORTANT
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A hostel had rations for 60 days for 500 students. After 12 days, 300 more students join the hostel mess. If the remaining ration last for k days, find the value of k

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Important Questions on Unitary Method and Time and Work

MEDIUM
7th ICSE
IMPORTANT
New Mathematics Today Class 7>Chapter 8 - Unitary Method and Time and Work>Exercise>Q 10
A man travels a certain distance by train in 4 hours and 12 minutes at the speed of 44.8 km per hour. When the speed of the train is increased to 58.8 km per hour, then the time taken to cover the same distance is k minutes. Find the value of k.
MEDIUM
7th ICSE
IMPORTANT
New Mathematics Today Class 7>Chapter 8 - Unitary Method and Time and Work>Exercise>Q 11
A besieged town has provisions to last for 3 weeks. Its population is 22400. How many people must be sent away in order that the provisions may last for 7 weeks?
MEDIUM
7th ICSE
IMPORTANT
New Mathematics Today Class 7>Chapter 8 - Unitary Method and Time and Work>Exercise>Q 12
It is found that a book will contain 350 pages, if 32 lines are allowed in a page. How many lines should be allowed in a page, if the book is to contain 280 pages?
MEDIUM
7th ICSE
IMPORTANT
New Mathematics Today Class 7>Chapter 8 - Unitary Method and Time and Work>Exercise>Q 2
One man can do a piece of work in 3 hours; another can do the same piece of work in 2 hours. How long will they take, if they work together? Write the answer in hours.
MEDIUM
7th ICSE
IMPORTANT
New Mathematics Today Class 7>Chapter 8 - Unitary Method and Time and Work>Exercise>Q 3
Amar and Vijay together can do a piece of work in 10 days, but Amar alone can do it in 15 days. How many days would Vijay alone take to do the same work? Write the answer in number of days.
MEDIUM
7th ICSE
IMPORTANT
New Mathematics Today Class 7>Chapter 8 - Unitary Method and Time and Work>Exercise>Q 4
Two car mechanics, Ram and Shyam, working together, can overhaul a car in 3 days. Ram working alone can do the job in 5 days. If Shyam works alone, how long will he take to do the same job? Write the answer in number of days.
MEDIUM
7th ICSE
IMPORTANT
New Mathematics Today Class 7>Chapter 8 - Unitary Method and Time and Work>Exercise>Q 5
Three men Suresh, Ramesh and Dinesh can do a piece of work in 9 hours, 18 hours, and 12 hours respectively. How long will they take, if they work together?
HARD
7th ICSE
IMPORTANT
New Mathematics Today Class 7>Chapter 8 - Unitary Method and Time and Work>Exercise>Q 6
A and B can do a piece of work in 10 hours, B and C in 12 hours and C and A in 15 hours. How long will they take if they work together? How long will each take to complete the work independently?