Advertisements
Advertisements
Question
A river 2 m deep and 45 m wide is flowing at the rate of 3 km per hour. Find the amount of water in cubic metres that runs into the sea per minute.
Advertisements
Solution
Depth of the river = 2 m
Width of the river = 45 m
Flowing rate of the water = 3 km/h
= `3 xx 1000/60` ...[∵ 1 km = 1000 m and 1 h = 60 min]
= `3000/60`
= `300/6`
= 50 m/min
The amount of water into sea per minute
= Depth × Width × Length of water of 1 min
= 2 × 45 × 50
= 4500 m3/min
APPEARS IN
RELATED QUESTIONS
Describe how the two figures at the right are alike and how they are different. Which box has larger lateral surface area?
Find the volume of a cube whose side is 1.5 dm .
Fill in the blank in the following so as to make the statement true:
1 kl = ....... m3
Fill in the blank in the following so as to make the statement true:
1 cu. km = ........ cu. m
Find the surface area of a cube whose edge is 1.2 m.
The volume of a cube is 729 cm3. Find its total surface area.
The dimensions of a rectangular box are in the ratio 4: 2 : 3. The difference between the cost of covering it with paper at Rs. 12 per m2 and with paper at the rate of 13.50 per m2 is Rs. 1,248. Find the dimensions of the box.
The length of the diagonals of a cube is 8√3 cm.
Find its:
(i) edge
(ii) total surface area
(iii) Volume
Find the volume of a cube whose diagonals is `sqrt(48)"cm"`.
Three equal cubes are placed adjacently in a row. Find the ratio of the total surface area of the resulting cuboid to that of the sum of the total surface areas of the three cubes.
