EXERSICE 11.1 SURFACE AREA AND VOLUME Q 3 AND 4

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Q3.Curved surface area of a cone is 308 cm2, and its slant height is 14 cm. Find
(i) the radius of the base and
(ii) the total surface area of the cone.(Assume π = 22/7)

एक शंकु का वक्र पृष्ठीय क्षेत्रफ्ला 308 cm2 है और इसकी तिर्यक ऊँचाई 14 cm है। ज्ञात कीजिए :
(i ) आधार की त्रिज्या
(ii ) शंकु का पृष्ठीय क्षेत्रफल

Q4. A conical tent is 10 m high, and the radius of its base is 24 m. Find
(i) slant height of the tent.
(ii) cost of the canvas required to make the tent, if the cost of 1 m2 canvas is Rs 70.

शंकु के आकार का एक तंबू 10 m ऊँचा है और उसके आधार की त्रिज्या 24 m है, तो ज्ञात कीजिए:
(i ) तंबू की तिर्यक ऊँचाई
(ii ) तंबू में लगे केनवास की लागत, यदि 1m2 केनवास की लागत 70 रुपए है।

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