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According to the question, CSA/TSA = 2/5 ⇒ [2πRh]/[2πR(R + h)] = 2/5 ⇒ h/(R + h) = 2/5 ⇒ 5h = 2R + 2h ⇒ h = (2/3)R .......(1) The volume of a cylinder and the volume of a solid hemisphere are equal. ⇒ πR2h = (2/3)πr3 ⇒ R2 × (2/3)R = (2/3) × (21)3 ⇒ R3 = (21)3 ⇒ R = 21 सेमी ∴ The radius of its base (in cm) is 21 cm.
Palash invest twice the sum invested by Vicky and withdraws half of the sum after 5 months and again withdraws half of the remaining sum after 5 months....
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‘M’, ‘N’, and ‘O’ entered into a business with initial investments of Rs. ‘4x + 550’, Rs. ‘5x + 450’, and Rs. ‘3x + 350’ respect...
‘C’ and ‘D’ entered into a business by investing Rs. ‘y’ and Rs. ‘y + 300’, respectively. After 10 months ‘C’ invested Rs. 400 more ...
P started a business with an investment of Rs.15000, after 6 months Q joined him with Rs.18000 and after another 6 months R joined them with Rs.22000. I...
