Outer part surface area = 2πRh Inner part surface area = 2πrh Area of shaded portion = 2πR² - (πr)² = π(R² - r²) Total surface area = 2πRh + 2πrh + 2π(R² - r²) = 2π(R+r) [h + R - r] = 2π(R+r) [h + thickness] Required surface area = 2π(R+r) [h + thickness] = 2 × 22/7 × (12.5 + 11.5) × 21 = 132 × 24 = 3168
Demand for goods which are needed for further production is called as
Which content in phosphatic fertilizers required for grade?
National Bureau of Agricultural Insect Resources (NBAIR) is located at-
Leaf curl disease of cotton is due to
The inflorescence of fennel is which of the following?
Which one of the following crop yields both oil and fiber?
Which seed treatment method involves dry seeds being placed in containers and covered with concentrated Sulphuric acid (H2SO4) or HCl in the ratio of on...
In angiosperms, the phloem is made up of which of the elements?
Which among the following is not asexual spore of fungi?
CO₂ fixation in C4 plants occurs in which type of cells?
