Question

50 two rupees coins are place one above the other to form a right circular cylinder if each coin has radius 1.4 cm and thickness 0.3 cm find its total surfa
ce area

Answer 1

thikness of all the coins will be 50*0.3= 15cm
than its area will be pi*r*r*h
than its surface area will be 3.14
$3.14 \times 1.4 \times 15$
than find solution by urself