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8th ICSE
IMPORTANT
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A batch of bottles were packed in 30 boxes with 10 bottles in each box. If the same batch is packed using 12 bottles in each box, how many number of boxes would be filled?

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Important Questions on Direct and Inverse Variation

HARD
8th ICSE
IMPORTANT
ICSE Understanding Mathematics Class 8>Chapter 9 - Direct and Inverse Variation>Exercise>Q 10
Vandana takes 24 minutes to reach her school if she goes at a speed of 5 km/h. If she wants to reach school in 20 minutes, her speed is k km/hr, then find the value of k.
HARD
8th ICSE
IMPORTANT
ICSE Understanding Mathematics Class 8>Chapter 9 - Direct and Inverse Variation>Exercise>Q 11
A fort is provided with food for 80 soldiers to last for 60 days. Find how long would the food last if 20 additional soldiers join after 15 days ?
HARD
8th ICSE
IMPORTANT
ICSE Understanding Mathematics Class 8>Chapter 9 - Direct and Inverse Variation>Exercise>Q 12
1200 soldiers in a fort had enough food for 28 days. After 4 days, some soldiers were sent to another fort and thus, the food lasted for 32 more days. If k number of soldiers left the fort, then find the value of k.
HARD
8th ICSE
IMPORTANT
ICSE Understanding Mathematics Class 8>Chapter 9 - Direct and Inverse Variation>Exercise>Q 1
A farmer can reap a field in 10 days while his wife can do it in 8 days. If they work together, in how much time can they reap the field?
HARD
8th ICSE
IMPORTANT
ICSE Understanding Mathematics Class 8>Chapter 9 - Direct and Inverse Variation>Exercise>Q 2
A can do 15th of a certain work in  2 days and B can do 23rd of it in 8 days. If they together complete the work in k11 days, find the value of k.
HARD
8th ICSE
IMPORTANT
ICSE Understanding Mathematics Class 8>Chapter 9 - Direct and Inverse Variation>Exercise>Q 3
One tap fills a tank in 20 minutes and another tap fills it in 12 minutes. The tank being empty and if both taps are opened together, in how many minutes the tank will be full?
HARD
8th ICSE
IMPORTANT
ICSE Understanding Mathematics Class 8>Chapter 9 - Direct and Inverse Variation>Exercise>Q 4
A can do a work in 6 days and B can do it in 8 days. They worked together for 2 days and then B left the work. How many days will A require to finish the work?
HARD
8th ICSE
IMPORTANT
ICSE Understanding Mathematics Class 8>Chapter 9 - Direct and Inverse Variation>Exercise>Q 5
A can do a piece of work in 40 days. He works at it for  8 days and then B finishes the remaining work in 16 days. How long will they take to complete the work if they do it together?