Mathematics
A wooden article was made by scooping out a hemisphere from each side of a solid cylinder as shown in the figure. If the height of the cylinder is 12 cm and its base is of radius 4.2 cm, find the total surface area of the article. (Take π = ).
Related Questions
Which term of the arithmetic progression 3, 15, 27, 39, …… will be 132 more than its 54th term ?
Five cards Ten, Jack, Queen, King and Ace of diamonds are shuffled face downwards. Then one card is picked at random.
(i) What is the probability that the card picked is queen ?
(ii) If a king is drawn first and put aside, what is the probability that the second card picked up is the ace ?
In the given figure, O is the center of the circle. PT and PQ are tangents to the circle from an exterior point P. If angle TPQ = 70°, find the angle TRQ.
The weights of 150 mangoes were recorded as given below :
Weight in gms Number of mangoes 160-170 15 170-180 24 180-190 30 190-200 36 200-210 24 210-220 12 220-230 9 Calculate the mean weight (to the nearest gram) by step-deviation method.