Question

10. A cylindrical roller is of length 2 m and diameter 84 cm. Find the number of revolutions it has to make
to cover an area of 7920 m2.
11. A river 10 metres deen and 100 metres wide is flowing at the rate of 4.5 km per hour. Find how many
ght, h​

Answer 1

Answer:

u can see in the pic

Step-by-step explanation:

hope it'll help you