Skip to content
Philoid
Browse Saved
Back to chapter
Mathematics
13. Volume and Surface Area
Home · Class 9 · Mathematics · Ref. Book · 13. Volume and Surface Area
Prev
Next
Q8 of 189 Page 482

A river 2 m deep and 45 m wide is flowing at the rate of 3 km per hour. Find the volume of water that runs into the sea per minute.

Given,


Depth of river (h) = 2 m


Breadth of river (b) = 45 m


Rate of flowing = 3 km/h


∴ Length = meter/min.


Volume of water = l × b × h = × 2 × 45 = 90 × 50 = 4500 m3


More from this chapter

All 189 →
6

A wall 15 m long, 30 cm wide and 4 m high is made of bricks, each measuring Ifof the total volume of the wall consists of mortar, how many bricks are there in the wall?

7

An open rectangular cistern when measured from outside is 1.35 m long, 1.08 m broad and 90 cm deep. It is made up of iron, which is 2.5 cm thick. Find the capacity of the cistern and the volume of the iron used.

9

A box made of sheet metal costs Rs 1620 at Rs 30 per square metre. If the box is 5 m long and 3 m wide, find its height.

10

Find the length of the longest pole that can be put in a room of dimensions

Questions · 189
13. Volume and Surface Area
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23
Back to chapter
ADVERTISEMENT
About Contact Privacy Terms
Philoid · 2026
  • Home
  • Search
  • Browse
  • Quiz
  • Saved