A blacksmith have big iron ball of diameter
36cm. He first formed four identical
cylindrical rod out of this ball for some
construction work. When he finished his
work with the cylindrical rod, he again
mixed all the iron rod and formed some
identical small balls, each of radius 9cm.(i)
When one solid is converted to
another solid shape, their-
(i) Surface area remain same
(ii) Volume remain same
Which of the above options is/are true:
(a) Only (i)
(b) Only (ii)
(c) Both (i) and (ii)
(d) None of them.
If the diameter of each cylinder
formed by him is 12cm, then height
of each of them is-
(a) 54cm
(b) 36cm
(c) 45cm
(d) 72cm(iii)
The number of small balls formed by the
blacksmith?
(a) 6
(b) 10
(c) 8
(d) 16(iv)
What is the cost price of steel coating of a
cylindrical iron rod at the rate of Rs.3.5per
100cm2
?
(a) Rs.79.20
(b) Rs.89.20
(c) Rs.85.56
(d) Rs.71.28
Answers
Answer:
A blacksmith have big iron ball of diameter 36cm. He first formed four identical
cylindrical rod out of this ball for some
construction work. When he finished his
work with the cylindrical rod, he again
mixed all the iron rod and formed some
identical small balls, each of radius 9cm.
Answer:
213 Silver chloride formula AgCl
214 Silver nitrate formula AgNO3
215 Silver oxide formula Ag2O
216 Silver phosphate formula Ag3PO4
217 Sodium acetate formula C2H3NaO2
218 Sodium bicarbonate formula NaHCO3
219 Sodium bromide formula NaBr
220 Sodium thiosulfate formula Na2S2O3
221 Sodium carbonate formula Na2CO3
222 Sodium chloride formula NaCl
223 Sodium chromate formula Na2CrO4
224 Sodium citrate formula Na3C6H5O7
225 Sodium cyanide formula NaCN
226 Sodium dichromate formula Na2Cr2O7
227 Sodium fluoride formula NaF
228 Sodium hydroxide formula NaOH
229 Sodium hypochlorite formula NaClO
230 Sodium iodide formula NaI
231 Uric acid formula C5H4N4O3
232 Sodium nitrate formula NaNO3
233 Sodium nitride formula Na3N
234 Sodium nitrite formula NaNO2
235 Sodium oxide formula Na2O
236 Sodium peroxide formula Na2O2
237 Sodium phosphate formula Na3PO4
238 Sodium sulfate formula Na2SO4
239 Sodium sulfide formula Na2S
240 Sodium sulfite formula Na2SO3
241 Strontium chloride formula SrCl2
242 Strontium nitrate formula Sr(NO3)2
243 Sucrose formula C12H22O11
244 Sugar formula C12H22O11
245 Sulfate ion formula SO42−
246 Sulfur dioxide formula SO2
247 Sulfur trioxide formula SO3
248 Sulfuric acid formula H2SO4
249 Sulfurous acid formula H2SO3
250 Tartaric acid formula C4H6O6
251 Toluene formula C7H8
252 Urea formula CH4N2O
253 Vinegar formula C2H4O2
254 Zinc acetate formula Zn(O2CCH3)2
255 Zinc carbonate formula ZnCO3
256 Zinc chloride formula ZnCl2
257 Zinc hydroxide formula Zn(OH)2
258 Zinc iodide formula ZnI2
259 Zinc nitrate formula Zn(NO3)2
260 Zinc phosphate formula Zn3(PO4)2
261 Zinc sulfate formula ZnSO4
262 Zinc sulfide formula ZnS
Step-by-step explanation:
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