The ratio of curved surface area to the total surface area of a right

1.	The ratio of curved surface area to the total surface area of a right circular cylinder is 2.3. If the radius of the cylinder is 5 cm, then volume ofthe cylinder is250T1 cm312517 cm3O 125cm3o 25 cm
Answer» Answer: 1078 CU.cm Step-by-step EXPLANATION: Given that:CURVED SURFACE area : Total surface area =1:2 Curved surface area :616=1:2 Curved surface area=2616=308 ⇒2πr(h+r)2πrh=21 ⇒h+rh=21 ⇒2h=h+r ⇒h=r Curved Surface area=2πrh=2πr2=308 since h=r ⇒2×722r2=308 ⇒r2=44308×7=49 ⇒r=7cm Since r=h h=7cm Volume of the CYLINDER=πr2h=722×7×7×7=1078cm3 ∴ Volume of the cylinder is 1078 cu cm.

The ratio of curved surface area to the total surface area of a right circular cylinder is 2.3. If the radius of the cylinder is 5 cm, then volume ofthe cylinder is250T1 cm312517 cm3O 125cm3o 25 cm

Answer»

Answer:

1078 CU.cm

Step-by-step EXPLANATION:

Given that:CURVED SURFACE area : Total surface area =1:2

Curved surface area :616=1:2

Curved surface area=2616=308

⇒2πr(h+r)2πrh=21

⇒h+rh=21

⇒2h=h+r

⇒h=r

Curved Surface area=2πrh=2πr2=308 since h=r

⇒2×722r2=308

⇒r2=44308×7=49

⇒r=7cm

Since r=h

h=7cm

Volume of the CYLINDER=πr2h=722×7×7×7=1078cm3

∴ Volume of the cylinder is 1078 cu cm.